CopyOutputResult must have a working release callback when received over mojo

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 23334645edcd140eb088e216fa9c8f58e56d0b91..5c75c1637605da994419ab6ce51bba574f7a8993 100644
--- a/cc/output/copy_output_result.h
+++ b/cc/output/copy_output_result.h
@@ -11,6 +11,7 @@
 #include "cc/base/cc_export.h"
 #include "cc/resources/single_release_callback.h"
 #include "cc/resources/texture_mailbox.h"
+#include "cc/resources/texture_mailbox_releaser_provider.h"
 #include "mojo/public/cpp/bindings/struct_traits.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/gfx/geometry/size.h"
@@ -53,6 +54,10 @@ class CC_EXPORT CopyOutputResult {
   void TakeTexture(TextureMailbox* texture_mailbox,
                    std::unique_ptr<SingleReleaseCallback>* release_callback);
 
+  void set_ptr_provider(TextureMailboxReleaserProvider* ptr_provider) {
+    ptr_provider_ = ptr_provider;
+  }
+
  private:
   friend struct mojo::StructTraits<mojom::CopyOutputResultDataView,
                                    std::unique_ptr<CopyOutputResult>>;
@@ -68,6 +73,7 @@ class CC_EXPORT CopyOutputResult {
   std::unique_ptr<SkBitmap> bitmap_;
   TextureMailbox texture_mailbox_;
   std::unique_ptr<SingleReleaseCallback> release_callback_;
+  TextureMailboxReleaserProvider* ptr_provider_ = nullptr;
 
   DISALLOW_COPY_AND_ASSIGN(CopyOutputResult);
 };