CopyOutputRequest must have a working result_callback_ when received over mojo

cc/ipc/copy_output_request_struct_traits.h

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_IPC_COPY_OUTPUT_REQUEST_STRUCT_TRAITS_H_
 #define CC_IPC_COPY_OUTPUT_REQUEST_STRUCT_TRAITS_H_
 
-#include "cc/ipc/copy_output_request.mojom-shared.h"
+#include "cc/ipc/copy_output_request.mojom.h"
 #include "cc/ipc/texture_mailbox_struct_traits.h"
 #include "cc/output/copy_output_request.h"
 #include "mojo/common/common_custom_types_struct_traits.h"
 #include "ui/gfx/geometry/mojo/geometry_struct_traits.h"
 
 namespace mojo {
 
 template <>
 struct StructTraits<cc::mojom::CopyOutputRequestDataView,
                     std::unique_ptr<cc::CopyOutputRequest>> {
@@ skipping 10 matching lines @@
   static const base::Optional<gfx::Rect>& area(
       const std::unique_ptr<cc::CopyOutputRequest>& request) {
     return request->area_;
   }
 
   static const base::Optional<cc::TextureMailbox>& texture_mailbox(
       const std::unique_ptr<cc::CopyOutputRequest>& request) {
     return request->texture_mailbox_;
   }
 
+  static cc::mojom::CopyOutputResultSenderPtr result_sender(
+      const std::unique_ptr<cc::CopyOutputRequest>& request);
+
   static bool Read(cc::mojom::CopyOutputRequestDataView data,
                    std::unique_ptr<cc::CopyOutputRequest>* out_p);
 };
 
 }  // namespace mojo
 
 #endif  // CC_IPC_COPY_OUTPUT_REQUEST_STRUCT_TRAITS_H_