bot_scaling: Add support for multiple dimension values

Add support for multiple values for a dimension via a repeated field.
This will allow for dimensions that could match more than a single
matching value.  An example of this is role; you can have multiple roles
for a bot group.

Bug: chromium:1027593
Change-Id: Ie42510147fad565f379399389f1250907cf0ce90
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/2148011
Commit-Queue: Mike Nichols <mikenichols@chromium.org>
Tested-by: Mike Nichols <mikenichols@chromium.org>
Reviewed-by: David Burger <dburger@chromium.org>
Reviewed-by: Sean Abraham <seanabraham@chromium.org>
Reviewed-by: Dhanya Ganesh <dhanyaganesh@chromium.org>
diff --git a/go/chromiumos/bot_scaling.pb.go b/go/chromiumos/bot_scaling.pb.go
index 83edba9..b902d5b 100644
--- a/go/chromiumos/bot_scaling.pb.go
+++ b/go/chromiumos/bot_scaling.pb.go
@@ -137,7 +137,9 @@
 	// Dimesion name
 	Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
 	// Dimension value
-	Value                string   `protobuf:"bytes,2,opt,name=value,proto3" json:"value,omitempty"`
+	Value string `protobuf:"bytes,2,opt,name=value,proto3" json:"value,omitempty"`
+	// Dimension multiple values
+	Values               []string `protobuf:"bytes,3,rep,name=values,proto3" json:"values,omitempty"`
 	XXX_NoUnkeyedLiteral struct{} `json:"-"`
 	XXX_unrecognized     []byte   `json:"-"`
 	XXX_sizecache        int32    `json:"-"`
@@ -182,6 +184,13 @@
 	return ""
 }
 
+func (m *SwarmingDimension) GetValues() []string {
+	if m != nil {
+		return m.Values
+	}
+	return nil
+}
+
 // Bot Policy to apply to a bot group.
 type BotPolicy struct {
 	// Bot group controlled by this policy, like, 'cq', 'postsubmit',...
@@ -651,53 +660,53 @@
 func init() { proto.RegisterFile("chromiumos/bot_scaling.proto", fileDescriptor_dbe70eabfd64e7ef) }
 
 var fileDescriptor_dbe70eabfd64e7ef = []byte{
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+	// 767 bytes of a gzipped FileDescriptorProto
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+	0xf3, 0x6f, 0x00, 0x00, 0x00, 0xff, 0xff, 0xae, 0xe2, 0x5d, 0xd1, 0x6f, 0x06, 0x00, 0x00,
 }
diff --git a/src/chromiumos/bot_scaling.proto b/src/chromiumos/bot_scaling.proto
index 99a340f..d9f3b7e 100644
--- a/src/chromiumos/bot_scaling.proto
+++ b/src/chromiumos/bot_scaling.proto
@@ -22,6 +22,8 @@
   string name = 1;
   // Dimension value
   string value = 2;
+  // Dimension multiple values
+  repeated string values = 3;
 }
 
 // Bot Policy to apply to a bot group.