Mojom structs for copy requests / results should map to unique_ptr

cc/output/copy_output_result.cc

Index: cc/output/copy_output_result.cc
diff --git a/cc/output/copy_output_result.cc b/cc/output/copy_output_result.cc
index 6d09a389f9b1d5ca68aaf1f7c33b650027ccac35..b623442af265db1ab9067343ffe7582851675227 100644
--- a/cc/output/copy_output_result.cc
+++ b/cc/output/copy_output_result.cc
@@ -26,16 +26,11 @@ CopyOutputResult::CopyOutputResult(
   DCHECK(texture_mailbox_.IsTexture());
 }
 
-CopyOutputResult::CopyOutputResult(CopyOutputResult&& other) = default;
-
 CopyOutputResult::~CopyOutputResult() {
   if (release_callback_)
     release_callback_->Run(gpu::SyncToken(), false);
 }
 
-CopyOutputResult& CopyOutputResult::operator=(CopyOutputResult&& other) =
-    default;
-
 std::unique_ptr<SkBitmap> CopyOutputResult::TakeBitmap() {
   return std::move(bitmap_);
 }