Implement StructTraits for various cc and gpu types

components/mus/public/interfaces/compositor_frame.mojom

Index: components/mus/public/interfaces/compositor_frame.mojom
diff --git a/components/mus/public/interfaces/compositor_frame.mojom b/components/mus/public/interfaces/compositor_frame.mojom
index 0779b3a6826298c0afe47d26ca4573a1e7aff75d..29f3e5e791d49a9c968193073d7de8cf8bf28457 100644
--- a/components/mus/public/interfaces/compositor_frame.mojom
+++ b/components/mus/public/interfaces/compositor_frame.mojom
@@ -4,6 +4,7 @@
 
 module mus.mojom;
 
+import "cc/ipc/returned_resource.mojom";
 import "components/mus/public/interfaces/quads.mojom";
 import "ui/gfx/geometry/mojo/geometry.mojom";
 import "gpu/ipc/common/mailbox_holder.mojom";
@@ -19,14 +20,6 @@ enum ResourceFormat {
   ETC1,
 };
 
-// See src/cc/resources/returned_resource.h.
-struct ReturnedResource {
-  uint32 id;
-  gpu.mojom.SyncToken sync_token;
-  int32 count;
-  bool lost;
-};
-
 // A TransferableResource is a graphics resource such as a texture or a bitmap
 // in shared memory (software mode) that is shared between the window server and
 // a client. This data structure is used to manage reuse of
@@ -67,5 +60,5 @@ interface Surface {
 };
 
 interface SurfaceClient {
-  ReturnResources(array<ReturnedResource> resources);
+  ReturnResources(array<cc.mojom.ReturnedResource> resources);
 };