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

content/common/gpu/client/gpu_context_tests.h

Index: content/common/gpu/client/gpu_context_tests.h
diff --git a/content/common/gpu/client/gpu_context_tests.h b/content/common/gpu/client/gpu_context_tests.h
index 8810789d076fbb9bc50151eca662c7fc4b2874da..9547ea17fdaac9529c5f7473573941b701e8d75f 100644
--- a/content/common/gpu/client/gpu_context_tests.h
+++ b/content/common/gpu/client/gpu_context_tests.h
@@ -69,9 +69,8 @@ CONTEXT_TEST_F(SignalTest, InvalidSignalSyncTokenTest) {
 
   // Signalling something that doesn't exist should run the callback
   // immediately.
-  gpu::SyncToken sync_token(gpu::CommandBufferNamespace::GPU_IO,
-                            0,
-                            1297824234,
+  gpu::SyncToken sync_token(gpu::CommandBufferNamespace::GPU_IO, 0,
+                            gpu::CommandBufferId::FromUnsafeValue(1297824234),
                             9123743439);
   TestSignalSyncToken(sync_token);
 };