bot_scaling: Change cores_per_bot to support float

On shared core bots this value can be a percentage of a core, not a full
integer, therefore we need to support float.  This is the same as
memory, in which we can expect values that are not ints.

This is only used in calculations today, and we're only populating it with ints now, so this should be transparent.

Bug: chromium:1090544
Change-Id: I1c950768a41e61ab15ce7efa0cffc2be73124619
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/2238747
Reviewed-by: Sean Abraham <seanabraham@chromium.org>
Commit-Queue: Mike Nichols <mikenichols@chromium.org>
Tested-by: Mike Nichols <mikenichols@chromium.org>
diff --git a/go/chromiumos/bot_scaling.pb.go b/go/chromiumos/bot_scaling.pb.go
index 2265aab..a311ada 100644
--- a/go/chromiumos/bot_scaling.pb.go
+++ b/go/chromiumos/bot_scaling.pb.go
@@ -119,7 +119,7 @@
 	// The string bot "shirt size" to be requested for the group.
 	BotSize string `protobuf:"bytes,1,opt,name=bot_size,json=botSize,proto3" json:"bot_size,omitempty"`
 	// The number of cores per bot. Will be used to limit quota usage.
-	CoresPerBot int32 `protobuf:"varint,2,opt,name=cores_per_bot,json=coresPerBot,proto3" json:"cores_per_bot,omitempty"`
+	CoresPerBot float32 `protobuf:"fixed32,2,opt,name=cores_per_bot,json=coresPerBot,proto3" json:"cores_per_bot,omitempty"`
 	// Estimated hourly cost.
 	HourlyCost float32 `protobuf:"fixed32,3,opt,name=hourly_cost,json=hourlyCost,proto3" json:"hourly_cost,omitempty"`
 	// Amount of memory in GB allocated to bot.
@@ -161,7 +161,7 @@
 	return ""
 }
 
-func (m *BotType) GetCoresPerBot() int32 {
+func (m *BotType) GetCoresPerBot() float32 {
 	if m != nil {
 		return m.CoresPerBot
 	}
@@ -885,7 +885,7 @@
 func init() { proto.RegisterFile("chromiumos/bot_scaling.proto", fileDescriptor_dbe70eabfd64e7ef) }
 
 var fileDescriptor_dbe70eabfd64e7ef = []byte{
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+	// 1002 bytes of a gzipped FileDescriptorProto
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+	0xf7, 0x91, 0x30, 0xd3, 0x2a, 0x97, 0xf2, 0xb5, 0xf0, 0x93, 0xb9, 0x30, 0x6f, 0x93, 0x5a, 0xaf,
+	0xbf, 0x39, 0xf9, 0x8d, 0x37, 0xe7, 0x0f, 0x0b, 0xea, 0x0b, 0xd2, 0x94, 0x86, 0xf4, 0xc9, 0xfd,
+	0xd7, 0x94, 0x4d, 0xc8, 0xdc, 0x76, 0xc8, 0xfc, 0x73, 0x21, 0x37, 0x9e, 0x39, 0xf4, 0x01, 0x14,
+	0x67, 0x54, 0xdc, 0xc9, 0xad, 0x82, 0x1e, 0x47, 0x69, 0x0e, 0x3c, 0xf5, 0x19, 0x71, 0x1f, 0x1c,
+	0xc5, 0xa6, 0x9b, 0x53, 0x8c, 0xdc, 0x87, 0x6e, 0x32, 0x17, 0xcd, 0x3f, 0x2d, 0xa8, 0x62, 0xe6,
+	0xb1, 0x2e, 0x67, 0x89, 0x69, 0x4a, 0x07, 0x0e, 0xb3, 0x4f, 0x62, 0xa6, 0x13, 0x3d, 0x31, 0xaf,
+	0x9e, 0xd5, 0x09, 0xae, 0x8a, 0x55, 0x53, 0x20, 0x0c, 0xc7, 0xdc, 0x24, 0xef, 0xcc, 0x97, 0xd9,
+	0xdb, 0x39, 0x45, 0xf4, 0x7a, 0x95, 0x68, 0x47, 0x91, 0x70, 0x9d, 0x6f, 0x83, 0x9d, 0xaf, 0x7f,
+	0xfe, 0x2a, 0x60, 0x0b, 0xcf, 0x36, 0xe3, 0xc1, 0xe9, 0xca, 0xaf, 0x08, 0x8d, 0x6f, 0xb8, 0x7b,
+	0xaa, 0x7e, 0x42, 0x4e, 0x03, 0xb6, 0xb2, 0xe3, 0xed, 0x2b, 0xf0, 0xcb, 0x7f, 0x02, 0x00, 0x00,
+	0xff, 0xff, 0xcd, 0xc6, 0x20, 0xbe, 0xb9, 0x08, 0x00, 0x00,
 }
diff --git a/src/chromiumos/bot_scaling.proto b/src/chromiumos/bot_scaling.proto
index 9af0f16..9076751 100644
--- a/src/chromiumos/bot_scaling.proto
+++ b/src/chromiumos/bot_scaling.proto
@@ -13,7 +13,7 @@
   // The string bot "shirt size" to be requested for the group.
   string bot_size = 1;
   // The number of cores per bot. Will be used to limit quota usage.
-  int32 cores_per_bot = 2;
+  float cores_per_bot = 2;
   // Estimated hourly cost.
   float hourly_cost = 3;
   // Amount of memory in GB allocated to bot.