Implement CompositorFrame Struct Traits

cc/ipc/traits_test_service.mojom

Index: cc/ipc/traits_test_service.mojom
diff --git a/cc/ipc/traits_test_service.mojom b/cc/ipc/traits_test_service.mojom
index 7c5b45641f4b56099985e4f24e038cc0a05b498e..bbc58fb11f038529358ad92e79b2498c134c5075 100644
--- a/cc/ipc/traits_test_service.mojom
+++ b/cc/ipc/traits_test_service.mojom
@@ -5,6 +5,7 @@
 module cc.mojom;
 
 import "cc/ipc/begin_frame_args.mojom";
+import "cc/ipc/compositor_frame.mojom";
 import "cc/ipc/compositor_frame_metadata.mojom";
 import "cc/ipc/filter_operation.mojom";
 import "cc/ipc/filter_operations.mojom";
@@ -25,6 +26,9 @@ interface TraitsTestService {
   EchoBeginFrameArgs(BeginFrameArgs b) => (BeginFrameArgs pass);
 
   [Sync]
+  EchoCompositorFrame(CompositorFrame c) => (CompositorFrame pass);
+
+  [Sync]
   EchoCompositorFrameMetadata(CompositorFrameMetadata c) =>
       (CompositorFrameMetadata pass);