test_platform: Add build information to execute request

BUG=chromium:1035202
TEST=./generate.sh

Change-Id: I5891489f654907b3663ff35e0ea4b0e9191c8e9c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/2025990
Tested-by: Prathmesh Prabhu <pprabhu@chromium.org>
Reviewed-by: Alex Zamorzaev <zamorzaev@chromium.org>
Commit-Queue: Prathmesh Prabhu <pprabhu@chromium.org>
Auto-Submit: Prathmesh Prabhu <pprabhu@chromium.org>
diff --git a/descpb.bin b/descpb.bin
index 9f34918..3c934f5 100644
--- a/descpb.bin
+++ b/descpb.bin
Binary files differ
diff --git a/go/test_platform/steps/execute/build.pb.go b/go/test_platform/steps/execute/build.pb.go
new file mode 100644
index 0000000..6767492
--- /dev/null
+++ b/go/test_platform/steps/execute/build.pb.go
@@ -0,0 +1,108 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: test_platform/steps/execute/build.proto
+
+package execute
+
+import (
+	fmt "fmt"
+	proto "github.com/golang/protobuf/proto"
+	duration "github.com/golang/protobuf/ptypes/duration"
+	timestamp "github.com/golang/protobuf/ptypes/timestamp"
+	math "math"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+
+// Build contains fields extracted from
+// https://chromium.googlesource.com/infra/luci/luci-go/+/master/buildbucket/proto/build.proto
+type Build struct {
+	CreateTime           *timestamp.Timestamp `protobuf:"bytes,1,opt,name=create_time,json=createTime,proto3" json:"create_time,omitempty"`
+	StartTime            *timestamp.Timestamp `protobuf:"bytes,2,opt,name=start_time,json=startTime,proto3" json:"start_time,omitempty"`
+	ExecutionTimeout     *duration.Duration   `protobuf:"bytes,3,opt,name=execution_timeout,json=executionTimeout,proto3" json:"execution_timeout,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}             `json:"-"`
+	XXX_unrecognized     []byte               `json:"-"`
+	XXX_sizecache        int32                `json:"-"`
+}
+
+func (m *Build) Reset()         { *m = Build{} }
+func (m *Build) String() string { return proto.CompactTextString(m) }
+func (*Build) ProtoMessage()    {}
+func (*Build) Descriptor() ([]byte, []int) {
+	return fileDescriptor_3bfb5ba3da11fbc5, []int{0}
+}
+
+func (m *Build) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Build.Unmarshal(m, b)
+}
+func (m *Build) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Build.Marshal(b, m, deterministic)
+}
+func (m *Build) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Build.Merge(m, src)
+}
+func (m *Build) XXX_Size() int {
+	return xxx_messageInfo_Build.Size(m)
+}
+func (m *Build) XXX_DiscardUnknown() {
+	xxx_messageInfo_Build.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Build proto.InternalMessageInfo
+
+func (m *Build) GetCreateTime() *timestamp.Timestamp {
+	if m != nil {
+		return m.CreateTime
+	}
+	return nil
+}
+
+func (m *Build) GetStartTime() *timestamp.Timestamp {
+	if m != nil {
+		return m.StartTime
+	}
+	return nil
+}
+
+func (m *Build) GetExecutionTimeout() *duration.Duration {
+	if m != nil {
+		return m.ExecutionTimeout
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*Build)(nil), "test_platform.steps.execute.Build")
+}
+
+func init() {
+	proto.RegisterFile("test_platform/steps/execute/build.proto", fileDescriptor_3bfb5ba3da11fbc5)
+}
+
+var fileDescriptor_3bfb5ba3da11fbc5 = []byte{
+	// 242 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x84, 0x90, 0x4d, 0x4b, 0xc4, 0x30,
+	0x10, 0x40, 0xa9, 0xa2, 0x60, 0xf6, 0xa2, 0x3d, 0xad, 0x15, 0x54, 0xbc, 0xe8, 0x29, 0x03, 0x7a,
+	0x12, 0x6f, 0x8b, 0x1f, 0xf7, 0x65, 0x4f, 0x5e, 0x96, 0xb4, 0x3b, 0x8d, 0x81, 0xa6, 0x53, 0x92,
+	0x09, 0xf8, 0x0f, 0xfd, 0x5b, 0xd2, 0x4c, 0x2b, 0xa8, 0xa0, 0xc7, 0x24, 0xef, 0xbd, 0x30, 0xa3,
+	0xae, 0x19, 0x23, 0x6f, 0x87, 0xce, 0x70, 0x4b, 0xc1, 0x43, 0x64, 0x1c, 0x22, 0xe0, 0x3b, 0x36,
+	0x89, 0x11, 0xea, 0xe4, 0xba, 0x9d, 0x1e, 0x02, 0x31, 0x95, 0x67, 0xdf, 0x40, 0x9d, 0x41, 0x3d,
+	0x81, 0xd5, 0xb9, 0x25, 0xb2, 0x1d, 0x42, 0x46, 0xeb, 0xd4, 0xc2, 0x2e, 0x05, 0xc3, 0x8e, 0x7a,
+	0x91, 0xab, 0x8b, 0x9f, 0xef, 0xec, 0x3c, 0x46, 0x36, 0x7e, 0x10, 0xe0, 0xea, 0xa3, 0x50, 0x07,
+	0xab, 0xf1, 0xb7, 0xf2, 0x41, 0x2d, 0x9a, 0x80, 0x86, 0x71, 0x3b, 0x32, 0xcb, 0xe2, 0xb2, 0xb8,
+	0x59, 0xdc, 0x56, 0x5a, 0x02, 0x7a, 0x0e, 0xe8, 0xcd, 0x1c, 0x58, 0x2b, 0xc1, 0xc7, 0x8b, 0xf2,
+	0x5e, 0xa9, 0xc8, 0x26, 0xb0, 0xb8, 0x7b, 0xff, 0xba, 0x47, 0x99, 0xce, 0xea, 0xb3, 0x3a, 0x91,
+	0x69, 0x1c, 0xf5, 0x59, 0xa7, 0xc4, 0xcb, 0xfd, 0x5c, 0x38, 0xfd, 0x55, 0x78, 0x9c, 0xc6, 0x5b,
+	0x1f, 0x7f, 0x39, 0x1b, 0x51, 0x56, 0x2f, 0xaf, 0x4f, 0x96, 0x74, 0xf3, 0x16, 0xc8, 0xbb, 0xe4,
+	0x35, 0x05, 0x0b, 0xf3, 0x81, 0x22, 0xb8, 0xbe, 0x0d, 0x46, 0xd6, 0x00, 0x96, 0xe0, 0x8f, 0xe5,
+	0xd7, 0x87, 0x99, 0xba, 0xfb, 0x0c, 0x00, 0x00, 0xff, 0xff, 0xb9, 0xce, 0x42, 0x92, 0xa2, 0x01,
+	0x00, 0x00,
+}
diff --git a/go/test_platform/steps/execution.pb.go b/go/test_platform/steps/execution.pb.go
index e8380fb..72f6825 100644
--- a/go/test_platform/steps/execution.pb.go
+++ b/go/test_platform/steps/execution.pb.go
@@ -9,6 +9,7 @@
 	test_platform "go.chromium.org/chromiumos/infra/proto/go/test_platform"
 	common "go.chromium.org/chromiumos/infra/proto/go/test_platform/common"
 	config "go.chromium.org/chromiumos/infra/proto/go/test_platform/config"
+	execute "go.chromium.org/chromiumos/infra/proto/go/test_platform/steps/execute"
 	math "math"
 )
 
@@ -126,12 +127,15 @@
 	// cros_test_platform request. This includes all the request-wide information
 	// needed in order to execute tests (e.g. labels, retry parameters,
 	// scheduling parameters).
-	RequestParams        *test_platform.Request_Params `protobuf:"bytes,1,opt,name=request_params,json=requestParams,proto3" json:"request_params,omitempty"`
-	Enumeration          *EnumerationResponse          `protobuf:"bytes,2,opt,name=enumeration,proto3" json:"enumeration,omitempty"`
-	Config               *config.Config                `protobuf:"bytes,3,opt,name=config,proto3" json:"config,omitempty"`
-	XXX_NoUnkeyedLiteral struct{}                      `json:"-"`
-	XXX_unrecognized     []byte                        `json:"-"`
-	XXX_sizecache        int32                         `json:"-"`
+	RequestParams *test_platform.Request_Params `protobuf:"bytes,1,opt,name=request_params,json=requestParams,proto3" json:"request_params,omitempty"`
+	Enumeration   *EnumerationResponse          `protobuf:"bytes,2,opt,name=enumeration,proto3" json:"enumeration,omitempty"`
+	Config        *config.Config                `protobuf:"bytes,3,opt,name=config,proto3" json:"config,omitempty"`
+	// Build contains relevant information about the current test platform
+	// buildbucket build.
+	Build                *execute.Build `protobuf:"bytes,4,opt,name=build,proto3" json:"build,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}       `json:"-"`
+	XXX_unrecognized     []byte         `json:"-"`
+	XXX_sizecache        int32          `json:"-"`
 }
 
 func (m *ExecuteRequest) Reset()         { *m = ExecuteRequest{} }
@@ -180,6 +184,13 @@
 	return nil
 }
 
+func (m *ExecuteRequest) GetBuild() *execute.Build {
+	if m != nil {
+		return m.Build
+	}
+	return nil
+}
+
 // ExecuteResponse defines the output of the Execute step.
 type ExecuteResponse struct {
 	// TODO(crbug.com/1020326) Deprecate and delete this in favor of
@@ -485,53 +496,55 @@
 }
 
 var fileDescriptor_54d6d12c45be2188 = []byte{
-	// 764 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xac, 0x55, 0xcd, 0x6e, 0xd3, 0x40,
-	0x10, 0x96, 0x93, 0xe6, 0x6f, 0x52, 0xd2, 0x6a, 0x5b, 0xc0, 0x18, 0x2a, 0xd2, 0x16, 0xa4, 0x9c,
-	0x6c, 0xa9, 0x54, 0x6a, 0x89, 0x80, 0x4a, 0xfd, 0xb9, 0x00, 0x07, 0xb4, 0x6d, 0x39, 0x20, 0xa1,
-	0x68, 0x9b, 0x6c, 0xdc, 0xb4, 0xb6, 0x37, 0xec, 0xae, 0x2b, 0xf2, 0x22, 0xdc, 0x38, 0xf3, 0x48,
-	0xf0, 0x18, 0x3c, 0x02, 0xda, 0x9f, 0x38, 0x71, 0x1a, 0x50, 0x40, 0x9c, 0xbc, 0xb3, 0xf3, 0xcd,
-	0x37, 0xb3, 0xdf, 0xec, 0x78, 0x61, 0x5b, 0x52, 0x21, 0x3b, 0xc3, 0x88, 0xc8, 0x3e, 0xe3, 0x71,
-	0x20, 0x24, 0x1d, 0x8a, 0x80, 0x7e, 0xa6, 0xdd, 0x54, 0x0e, 0x58, 0xe2, 0x0f, 0x39, 0x93, 0x0c,
-	0xad, 0xe5, 0x40, 0xbe, 0x06, 0x79, 0x8f, 0xf3, 0x91, 0x5d, 0x16, 0xc7, 0x2c, 0x09, 0x24, 0x11,
-	0xd7, 0x26, 0xca, 0x7b, 0x98, 0x07, 0x70, 0xfa, 0x29, 0xa5, 0x42, 0x5a, 0xe7, 0xd3, 0xb9, 0x79,
-	0x93, 0x34, 0xa6, 0x9c, 0x4c, 0x32, 0x7b, 0x9b, 0xb3, 0x49, 0x92, 0xfe, 0x20, 0xb4, 0x1f, 0x0b,
-	0xd9, 0xc8, 0x43, 0x54, 0x01, 0x42, 0x12, 0x49, 0x8d, 0x7b, 0xeb, 0x6b, 0x01, 0x56, 0x4e, 0xf4,
-	0x79, 0x28, 0x36, 0x15, 0x08, 0x74, 0x00, 0x55, 0x5b, 0x8d, 0x70, 0x9d, 0x66, 0xb1, 0x55, 0xdf,
-	0xd9, 0xf6, 0xe7, 0x1c, 0xd1, 0xcf, 0xc7, 0xe1, 0x2c, 0x08, 0x11, 0x58, 0x91, 0x24, 0x0c, 0x69,
-	0xaf, 0x93, 0xf1, 0x14, 0x34, 0xcf, 0xfe, 0x02, 0x3c, 0xc2, 0x3f, 0xd3, 0xb1, 0x63, 0xf3, 0x24,
-	0x91, 0x7c, 0x84, 0x1b, 0x32, 0xb7, 0xe9, 0xf5, 0x61, 0x6d, 0x0e, 0x0c, 0xad, 0x42, 0xf1, 0x9a,
-	0x8e, 0x5c, 0xa7, 0xe9, 0xb4, 0x6a, 0x58, 0x2d, 0xd1, 0x73, 0x28, 0xdd, 0x90, 0x28, 0xa5, 0x6e,
-	0xa1, 0xe9, 0x2c, 0x7a, 0x12, 0x13, 0xd1, 0x2e, 0xec, 0x3b, 0x5b, 0xdf, 0x0a, 0xb0, 0x9a, 0x79,
-	0xc5, 0x90, 0x25, 0x82, 0x0a, 0x74, 0x08, 0x35, 0x3e, 0x36, 0xac, 0x42, 0x4f, 0xfe, 0xcc, 0x6b,
-	0xc0, 0x78, 0x12, 0x86, 0x28, 0xac, 0x66, 0x1a, 0x8d, 0xa9, 0x8c, 0x48, 0xed, 0x45, 0xa8, 0x26,
-	0x2a, 0x59, 0xdb, 0xc8, 0xb4, 0x22, 0xf3, 0xbb, 0xde, 0x25, 0xac, 0xcf, 0x03, 0xce, 0x11, 0xaa,
-	0x9d, 0x17, 0x6a, 0xb1, 0x03, 0x4d, 0x29, 0xf5, 0xc3, 0x81, 0x46, 0x5e, 0x47, 0x74, 0x0c, 0x0d,
-	0x7b, 0x01, 0x3a, 0x43, 0xc2, 0x49, 0x2c, 0x74, 0xbe, 0xfa, 0xce, 0xc6, 0x0c, 0xb7, 0xc5, 0xfb,
-	0xef, 0x34, 0x08, 0xdf, 0xb1, 0x41, 0xc6, 0x44, 0xaf, 0xa1, 0x3e, 0x75, 0xf3, 0x6d, 0x79, 0xad,
-	0xf9, 0xe5, 0x4d, 0x70, 0x59, 0x89, 0xd3, 0xc1, 0x68, 0x17, 0xca, 0x66, 0x3a, 0xdc, 0xa2, 0xa6,
-	0x79, 0x34, 0x43, 0x63, 0x47, 0xe7, 0x48, 0x7f, 0xb0, 0xc5, 0x6e, 0x7d, 0xaf, 0x4c, 0x0d, 0x89,
-	0xa1, 0x45, 0x18, 0x96, 0xd5, 0x2c, 0xa9, 0xee, 0xa5, 0x51, 0x36, 0x28, 0xc1, 0x22, 0xaa, 0xf9,
-	0x67, 0x44, 0x5c, 0x63, 0x1d, 0x87, 0xeb, 0x32, 0x5b, 0x0b, 0x74, 0x05, 0xeb, 0x5d, 0x96, 0x08,
-	0x16, 0x0d, 0x7a, 0x44, 0x9a, 0x9b, 0xa1, 0xb9, 0x8b, 0x9a, 0x7b, 0x6f, 0x21, 0xee, 0xa3, 0x29,
-	0x02, 0x9b, 0x63, 0xad, 0x7b, 0x6b, 0x4f, 0x20, 0x1f, 0x4a, 0xfa, 0x3f, 0x60, 0xf5, 0x74, 0x67,
-	0xc8, 0x55, 0x89, 0xa7, 0xca, 0x8f, 0x0d, 0xcc, 0xfb, 0xb9, 0x04, 0x30, 0xa9, 0x1b, 0x3d, 0x80,
-	0xaa, 0x3e, 0x7e, 0xca, 0x23, 0xcd, 0x50, 0xc3, 0x15, 0x65, 0x9f, 0xf3, 0x68, 0xc2, 0x5c, 0x5c,
-	0x88, 0x19, 0x21, 0x58, 0x4a, 0x48, 0x4c, 0xdd, 0x25, 0x4d, 0xa3, 0xd7, 0xe8, 0x3e, 0x54, 0x22,
-	0x16, 0x6a, 0xf6, 0x92, 0xde, 0x2e, 0x47, 0x2c, 0x54, 0xe4, 0x2e, 0x54, 0x88, 0x94, 0x34, 0x1e,
-	0x4a, 0xb7, 0xdc, 0x74, 0x5a, 0x25, 0x3c, 0x36, 0xd1, 0x47, 0x00, 0x9d, 0xa8, 0x4b, 0xd4, 0x28,
-	0x55, 0xb4, 0x64, 0xaf, 0xfe, 0xb2, 0x1d, 0xfe, 0x19, 0x15, 0xf2, 0x88, 0x08, 0x6a, 0x95, 0xab,
-	0x49, 0x6b, 0xab, 0x7f, 0xda, 0xf2, 0x90, 0xd3, 0x2b, 0x76, 0xd1, 0xd1, 0x24, 0x6e, 0xf5, 0xbf,
-	0x24, 0xa8, 0x1b, 0xce, 0x53, 0x15, 0x86, 0x5e, 0x40, 0x55, 0x1d, 0xba, 0x47, 0x24, 0x71, 0x6b,
-	0x5a, 0xbb, 0xcd, 0x5b, 0xd7, 0x53, 0xbd, 0x22, 0x9a, 0xef, 0x2d, 0x0b, 0x8f, 0x89, 0x24, 0x58,
-	0xe9, 0xa4, 0x16, 0x68, 0x0f, 0x5c, 0x31, 0x4a, 0xba, 0x97, 0x9c, 0x25, 0x2c, 0x15, 0x9d, 0x31,
-	0x93, 0xd6, 0x10, 0xb4, 0x86, 0x77, 0xa7, 0xfc, 0x36, 0xfc, 0x9c, 0x47, 0xde, 0x17, 0x07, 0x1a,
-	0xf9, 0xb2, 0xb2, 0x96, 0x38, 0x53, 0x2d, 0x69, 0x43, 0xe5, 0x86, 0xf2, 0xde, 0xa0, 0x2b, 0x75,
-	0xc3, 0x1b, 0x3b, 0xcd, 0xdf, 0x35, 0xd6, 0x7f, 0x6f, 0x70, 0x78, 0x1c, 0x80, 0x76, 0xe1, 0xde,
-	0x65, 0x1a, 0x93, 0xa4, 0xc3, 0x29, 0xe9, 0x91, 0x8b, 0x88, 0x76, 0x44, 0x1a, 0xc7, 0x84, 0x8f,
-	0xf4, 0x1d, 0xa9, 0xe1, 0x75, 0xed, 0xc5, 0xd6, 0x79, 0x6a, 0x7c, 0x1e, 0x01, 0x74, 0xfb, 0x36,
-	0xa3, 0x37, 0x50, 0xb5, 0x2d, 0xff, 0xe7, 0xa1, 0xcb, 0x08, 0x0e, 0x0f, 0x3e, 0xbc, 0x0c, 0x99,
-	0xaf, 0x44, 0x89, 0x07, 0x69, 0xec, 0x33, 0x1e, 0x06, 0x63, 0x83, 0x89, 0x60, 0x90, 0xf4, 0x39,
-	0x09, 0xf4, 0x43, 0x19, 0x84, 0x2c, 0x98, 0xf3, 0x26, 0x5f, 0x94, 0xb5, 0xf7, 0xd9, 0xaf, 0x00,
-	0x00, 0x00, 0xff, 0xff, 0xad, 0xab, 0x73, 0xf4, 0x29, 0x08, 0x00, 0x00,
+	// 799 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xac, 0x55, 0xcb, 0x6e, 0xdb, 0x46,
+	0x14, 0x05, 0x25, 0xeb, 0x75, 0xe5, 0xca, 0xc6, 0xd8, 0x6d, 0x59, 0xb6, 0x46, 0x65, 0xb9, 0x45,
+	0xb5, 0x22, 0x01, 0xd7, 0x80, 0x5d, 0xa1, 0xad, 0x01, 0x3f, 0x36, 0x6d, 0x17, 0xc5, 0xd8, 0xce,
+	0x22, 0x40, 0x20, 0x8c, 0xa4, 0x11, 0x2d, 0x9b, 0xe4, 0x28, 0x33, 0x43, 0x23, 0xfa, 0x8d, 0x2c,
+	0xb2, 0xcb, 0x3a, 0x9f, 0x94, 0xdf, 0xc8, 0x27, 0x04, 0xf3, 0x10, 0x25, 0xca, 0x74, 0xa0, 0x04,
+	0x59, 0x69, 0xee, 0xdc, 0x73, 0xce, 0xdc, 0x39, 0x77, 0xae, 0x08, 0x07, 0x92, 0x0a, 0xd9, 0x9f,
+	0x46, 0x44, 0x8e, 0x19, 0x8f, 0x03, 0x21, 0xe9, 0x54, 0x04, 0xf4, 0x15, 0x1d, 0xa6, 0x72, 0xc2,
+	0x12, 0x7f, 0xca, 0x99, 0x64, 0x68, 0x27, 0x07, 0xf2, 0x35, 0xc8, 0xfb, 0x39, 0xcf, 0x1c, 0xb2,
+	0x38, 0x66, 0x49, 0x20, 0x89, 0xb8, 0x37, 0x2c, 0x6f, 0x7f, 0x15, 0x90, 0x8c, 0x27, 0xa1, 0xfd,
+	0xb1, 0x90, 0x1f, 0xf3, 0x10, 0x4e, 0x5f, 0xa6, 0x54, 0x48, 0x9b, 0xfc, 0xb5, 0xb0, 0xb4, 0x24,
+	0x8d, 0x29, 0x27, 0x8b, 0xe2, 0xbc, 0xdf, 0x9e, 0xbe, 0x01, 0x0d, 0x06, 0xe9, 0x24, 0x1a, 0x59,
+	0xe0, 0x5e, 0x1e, 0xa8, 0x2a, 0x15, 0x92, 0x48, 0x6a, 0xd2, 0x9d, 0xb7, 0x25, 0xd8, 0xba, 0x34,
+	0x34, 0x6c, 0xea, 0x10, 0xe8, 0x14, 0xea, 0xb6, 0x26, 0xe1, 0x3a, 0xed, 0x72, 0xb7, 0x79, 0x78,
+	0xe0, 0x17, 0x78, 0xe1, 0xe7, 0x79, 0x38, 0x23, 0x21, 0x02, 0x5b, 0x92, 0x84, 0x21, 0x1d, 0xf5,
+	0x33, 0x9d, 0x92, 0xd6, 0x39, 0x59, 0x43, 0x47, 0xf8, 0xd7, 0x9a, 0x3b, 0x0f, 0x2f, 0x13, 0xc9,
+	0x67, 0xb8, 0x25, 0x73, 0x9b, 0xde, 0x18, 0x76, 0x0a, 0x60, 0x68, 0x1b, 0xca, 0xf7, 0x74, 0xe6,
+	0x3a, 0x6d, 0xa7, 0xdb, 0xc0, 0x6a, 0x89, 0xfe, 0x80, 0xca, 0x03, 0x89, 0x52, 0xea, 0x96, 0xda,
+	0xce, 0xba, 0x37, 0x31, 0x8c, 0x5e, 0xe9, 0xc4, 0xe9, 0xbc, 0x2b, 0xc1, 0x76, 0x96, 0x15, 0x53,
+	0x96, 0x08, 0x2a, 0xd0, 0x19, 0x34, 0xf8, 0x3c, 0xb0, 0x0e, 0xfd, 0xf2, 0x69, 0x5d, 0x03, 0xc6,
+	0x0b, 0x1a, 0xa2, 0xb0, 0x9d, 0x79, 0x34, 0x97, 0x32, 0x26, 0xf5, 0xd6, 0x91, 0x5a, 0xb8, 0x64,
+	0x63, 0x63, 0xd3, 0x96, 0xcc, 0xef, 0x7a, 0xb7, 0xb0, 0x5b, 0x04, 0x2c, 0x30, 0xaa, 0x97, 0x37,
+	0x6a, 0xbd, 0x0b, 0x2d, 0x39, 0xf5, 0xba, 0x04, 0xad, 0xbc, 0x8f, 0xe8, 0x02, 0x5a, 0xf6, 0x01,
+	0xf4, 0xa7, 0x84, 0x93, 0x58, 0xe8, 0xf3, 0x9a, 0x87, 0x7b, 0x2b, 0xda, 0x16, 0xef, 0xff, 0xaf,
+	0x41, 0xf8, 0x1b, 0x4b, 0x32, 0x21, 0xfa, 0x07, 0x9a, 0x4b, 0xef, 0xdf, 0x96, 0xd7, 0x2d, 0x2e,
+	0x6f, 0x81, 0xcb, 0x4a, 0x5c, 0x26, 0xa3, 0x23, 0xa8, 0x9a, 0x51, 0x74, 0xcb, 0x5a, 0xe6, 0xa7,
+	0x15, 0x19, 0x3b, 0xa7, 0xe7, 0xfa, 0x07, 0x5b, 0x2c, 0x3a, 0x81, 0x8a, 0x1e, 0x29, 0x77, 0x43,
+	0x93, 0x3a, 0x85, 0x67, 0xdb, 0xe1, 0xf3, 0xcf, 0x14, 0x12, 0x1b, 0x42, 0xe7, 0x7d, 0x6d, 0x69,
+	0xbc, 0x4c, 0x41, 0x08, 0xc3, 0xa6, 0x9a, 0x42, 0xd5, 0xf7, 0x34, 0xca, 0x46, 0x2c, 0x58, 0xc7,
+	0x6f, 0xff, 0x9a, 0x88, 0x7b, 0xac, 0x79, 0xb8, 0x29, 0xb3, 0xb5, 0x40, 0x77, 0xb0, 0x3b, 0x64,
+	0x89, 0x60, 0xd1, 0x64, 0x44, 0xa4, 0x79, 0x53, 0x5a, 0xbb, 0xac, 0xb5, 0x8f, 0xd7, 0xd2, 0x3e,
+	0x5f, 0x12, 0xb0, 0x67, 0xec, 0x0c, 0x1f, 0xed, 0x09, 0xe4, 0x43, 0x45, 0xff, 0x83, 0xd8, 0x4e,
+	0xb8, 0x2b, 0xe2, 0xaa, 0xc4, 0x2b, 0x95, 0xc7, 0x06, 0xe6, 0x7d, 0xd8, 0x00, 0x58, 0xd4, 0x8d,
+	0x7e, 0x80, 0xba, 0xbe, 0x7e, 0xca, 0x23, 0xad, 0xd0, 0xc0, 0x35, 0x15, 0xdf, 0xf0, 0x68, 0xa1,
+	0x5c, 0x5e, 0x4b, 0x19, 0x21, 0xd8, 0x48, 0x48, 0x4c, 0x75, 0x5b, 0x1a, 0x58, 0xaf, 0xd1, 0xf7,
+	0x50, 0x8b, 0x58, 0xa8, 0xd5, 0x2b, 0x7a, 0xbb, 0x1a, 0xb1, 0x50, 0x89, 0xbb, 0x50, 0x23, 0x52,
+	0xd2, 0x78, 0x2a, 0xdd, 0x6a, 0xdb, 0xe9, 0x56, 0xf0, 0x3c, 0x44, 0x2f, 0x00, 0xf4, 0x41, 0x43,
+	0xa2, 0x86, 0xb0, 0xa6, 0x2d, 0xfb, 0xfb, 0x33, 0xdb, 0xe1, 0x5f, 0x53, 0x21, 0xcf, 0x89, 0xa0,
+	0xd6, 0xb9, 0x86, 0xb4, 0xb1, 0xfa, 0x37, 0xdc, 0x9c, 0x72, 0x7a, 0xc7, 0x06, 0x7d, 0x2d, 0xe2,
+	0xd6, 0xbf, 0xca, 0x01, 0x4d, 0xa3, 0x79, 0xa5, 0x68, 0xe8, 0x4f, 0xa8, 0xab, 0x4b, 0x8f, 0x88,
+	0x24, 0x6e, 0x43, 0x7b, 0xb7, 0xff, 0xe8, 0x61, 0xab, 0x0f, 0x95, 0xd6, 0xfb, 0x8f, 0x85, 0x17,
+	0x44, 0x12, 0xac, 0x7c, 0x52, 0x0b, 0x74, 0x0c, 0xae, 0x98, 0x25, 0xc3, 0x5b, 0xce, 0x12, 0x96,
+	0x8a, 0xfe, 0x5c, 0x49, 0x7b, 0x08, 0xda, 0xc3, 0x6f, 0x97, 0xf2, 0x96, 0x7e, 0xc3, 0x23, 0xef,
+	0x8d, 0x03, 0xad, 0x7c, 0x59, 0x59, 0x4b, 0x9c, 0xa5, 0x96, 0xf4, 0xa0, 0xf6, 0x40, 0xf9, 0x68,
+	0x32, 0x94, 0xba, 0xe1, 0xad, 0xc3, 0xf6, 0x53, 0x8d, 0xf5, 0x9f, 0x19, 0x1c, 0x9e, 0x13, 0xd0,
+	0x11, 0x7c, 0x77, 0x9b, 0xc6, 0x24, 0xe9, 0x73, 0x4a, 0x46, 0x64, 0x10, 0xd1, 0xbe, 0x48, 0xe3,
+	0x98, 0xf0, 0x99, 0x7e, 0x23, 0x0d, 0xbc, 0xab, 0xb3, 0xd8, 0x26, 0xaf, 0x4c, 0xce, 0x23, 0x80,
+	0x1e, 0xbf, 0x66, 0xf4, 0x2f, 0xd4, 0x6d, 0xcb, 0xbf, 0x78, 0xe8, 0x32, 0x81, 0xb3, 0xd3, 0xe7,
+	0x7f, 0x85, 0xcc, 0x57, 0xa6, 0xc4, 0x93, 0x34, 0xf6, 0x19, 0x0f, 0x83, 0x79, 0xc0, 0x44, 0x30,
+	0x49, 0xc6, 0x9c, 0x04, 0xfa, 0x13, 0x1b, 0x84, 0x2c, 0x28, 0xf8, 0x58, 0x0f, 0xaa, 0x3a, 0xfb,
+	0xfb, 0xc7, 0x00, 0x00, 0x00, 0xff, 0xff, 0x70, 0x16, 0x00, 0x55, 0x8c, 0x08, 0x00, 0x00,
 }
diff --git a/src/test_platform/steps/execute/build.proto b/src/test_platform/steps/execute/build.proto
new file mode 100644
index 0000000..943134f
--- /dev/null
+++ b/src/test_platform/steps/execute/build.proto
@@ -0,0 +1,20 @@
+// Copyright 2020 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+syntax = "proto3";
+
+package test_platform.steps.execute;
+
+import "google/protobuf/duration.proto";
+import "google/protobuf/timestamp.proto";
+
+option go_package = "go.chromium.org/chromiumos/infra/proto/go/test_platform/steps/execute";
+
+// Build contains fields extracted from
+// https://chromium.googlesource.com/infra/luci/luci-go/+/master/buildbucket/proto/build.proto
+message Build {
+    google.protobuf.Timestamp create_time = 1;
+    google.protobuf.Timestamp start_time = 2;
+    google.protobuf.Duration execution_timeout = 3;
+}
\ No newline at end of file
diff --git a/src/test_platform/steps/execution.proto b/src/test_platform/steps/execution.proto
index 5905f10..d11685e 100644
--- a/src/test_platform/steps/execution.proto
+++ b/src/test_platform/steps/execution.proto
@@ -7,9 +7,10 @@
 package test_platform.steps;
 
 import "test_platform/common/task.proto";
+import "test_platform/config/config.proto";
 import "test_platform/request.proto";
 import "test_platform/steps/enumeration.proto";
-import "test_platform/config/config.proto";
+import "test_platform/steps/execute/build.proto";
 import "test_platform/taskstate.proto";
 
 option go_package = "go.chromium.org/chromiumos/infra/proto/go/test_platform/steps";
@@ -34,10 +35,11 @@
     // needed in order to execute tests (e.g. labels, retry parameters,
     // scheduling parameters).
     test_platform.Request.Params request_params = 1;
-
     EnumerationResponse enumeration = 2;
-
     test_platform.config.Config config = 3;
+    // Build contains relevant information about the current test platform
+    // buildbucket build.
+    test_platform.steps.execute.Build build = 4;
 }
 
 // ExecuteResponse defines the output of the Execute step.