Introducing gpu::CommandBufferId as a distinct, IdType<...>-based type.

mojo/converters/surfaces/tests/surface_unittest.cc

Index: mojo/converters/surfaces/tests/surface_unittest.cc
diff --git a/mojo/converters/surfaces/tests/surface_unittest.cc b/mojo/converters/surfaces/tests/surface_unittest.cc
index f43b426965c5f01bdef39f002fcc00aa28a9e5cf..2f26c4cf01a1cbaaf92b36162ba7a379ac730ad2 100644
--- a/mojo/converters/surfaces/tests/surface_unittest.cc
+++ b/mojo/converters/surfaces/tests/surface_unittest.cc
@@ -15,6 +15,7 @@
 #include "cc/resources/resource_provider.h"
 #include "gpu/command_buffer/common/mailbox.h"
 #include "gpu/command_buffer/common/mailbox_holder.h"
+#include "gpu/command_buffer/common/sync_token.h"
 #include "mojo/converters/geometry/geometry_type_converters.h"
 #include "mojo/converters/surfaces/surfaces_type_converters.h"
 #include "mojo/converters/transform/transform_type_converters.h"
@@ -407,7 +408,8 @@ TEST(SurfaceLibTest, MailboxHolder) {
   gpu::Mailbox mailbox;
   mailbox.Generate();
   uint32_t texture_target = GL_TEXTURE_2D;
-  gpu::SyncToken sync_token(gpu::CommandBufferNamespace::GPU_IO, 0, 1, 7u);
+  gpu::SyncToken sync_token(gpu::CommandBufferNamespace::GPU_IO, 0,
+                            gpu::CommandBufferId::FromUnsafeValue(1), 7u);
   sync_token.SetVerifyFlush();
   gpu::MailboxHolder holder(mailbox, sync_token, texture_target);
 
@@ -459,7 +461,8 @@ TEST(SurfaceLibTest, TransferableResource) {
 
 TEST(SurfaceLibTest, ReturnedResource) {
   uint32_t id = 5u;
-  gpu::SyncToken sync_token(gpu::CommandBufferNamespace::GPU_IO, 0, 1, 24u);
+  gpu::SyncToken sync_token(gpu::CommandBufferNamespace::GPU_IO, 0,
+                            gpu::CommandBufferId::FromUnsafeValue(1), 24u);
   sync_token.SetVerifyFlush();
   int count = 2;
   bool lost = false;