Mojom structs for copy requests / results should map to unique_ptr

cc/output/copy_output_result.h

Index: cc/output/copy_output_result.h
diff --git a/cc/output/copy_output_result.h b/cc/output/copy_output_result.h
index cca1270b09bf112eaeb56a01ffe110ff846f734e..23334645edcd140eb088e216fa9c8f58e56d0b91 100644
--- a/cc/output/copy_output_result.h
+++ b/cc/output/copy_output_result.h
@@ -42,14 +42,8 @@ class CC_EXPORT CopyOutputResult {
                                                  std::move(release_callback)));
   }
 
-  CopyOutputResult();
-
-  CopyOutputResult(CopyOutputResult&& other);
-
   ~CopyOutputResult();
 
-  CopyOutputResult& operator=(CopyOutputResult&& other);
-
   bool IsEmpty() const { return !HasBitmap() && !HasTexture(); }
   bool HasBitmap() const { return !!bitmap_ && !bitmap_->isNull(); }
   bool HasTexture() const { return texture_mailbox_.IsValid(); }
@@ -61,8 +55,9 @@ class CC_EXPORT CopyOutputResult {
 
  private:
   friend struct mojo::StructTraits<mojom::CopyOutputResultDataView,
-                                   CopyOutputResult>;
+                                   std::unique_ptr<CopyOutputResult>>;
 
+  CopyOutputResult();
   explicit CopyOutputResult(std::unique_ptr<SkBitmap> bitmap);
   explicit CopyOutputResult(
       const gfx::Size& size,
@@ -73,6 +68,8 @@ class CC_EXPORT CopyOutputResult {
   std::unique_ptr<SkBitmap> bitmap_;
   TextureMailbox texture_mailbox_;
   std::unique_ptr<SingleReleaseCallback> release_callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(CopyOutputResult);
 };
 
 }  // namespace cc