Implement StructTraits for various cc and gpu types

components/mus/public/cpp/surfaces/surfaces_type_converters.cc

Index: components/mus/public/cpp/surfaces/surfaces_type_converters.cc
diff --git a/components/mus/public/cpp/surfaces/surfaces_type_converters.cc b/components/mus/public/cpp/surfaces/surfaces_type_converters.cc
index ec44f7a47ea34396586d78c1613bf0898d76f893..a456b334e9ce48011c50f00fa27d356e82360b03 100644
--- a/components/mus/public/cpp/surfaces/surfaces_type_converters.cc
+++ b/components/mus/public/cpp/surfaces/surfaces_type_converters.cc
@@ -42,8 +42,6 @@ using mus::mojom::QuadPtr;
 using mus::mojom::RenderPassQuadState;
 using mus::mojom::RenderPassQuadStatePtr;
 using mus::mojom::ResourceFormat;
-using mus::mojom::ReturnedResource;
-using mus::mojom::ReturnedResourcePtr;
 using mus::mojom::SharedQuadState;
 using mus::mojom::SharedQuadStatePtr;
 using mus::mojom::SolidColorQuadState;
@@ -468,30 +466,6 @@ TypeConverter<cc::TransferableResource, TransferableResourcePtr>::Convert(
 }
 
 // static
-ReturnedResourcePtr
-TypeConverter<ReturnedResourcePtr, cc::ReturnedResource>::Convert(
-    const cc::ReturnedResource& input) {
-  ReturnedResourcePtr returned = ReturnedResource::New();
-  returned->id = input.id;
-  returned->sync_token = input.sync_token;
-  returned->count = input.count;
-  returned->lost = input.lost;
-  return returned;
-}
-
-// static
-cc::ReturnedResource
-TypeConverter<cc::ReturnedResource, ReturnedResourcePtr>::Convert(
-    const ReturnedResourcePtr& input) {
-  cc::ReturnedResource returned;
-  returned.id = input->id;
-  returned.sync_token = input->sync_token;
-  returned.count = input->count;
-  returned.lost = input->lost;
-  return returned;
-}
-
-// static
 CompositorFrameMetadataPtr
 TypeConverter<CompositorFrameMetadataPtr, cc::CompositorFrameMetadata>::Convert(
     const cc::CompositorFrameMetadata& input) {