Animated scroll shouldn't consume unhandled scrolls for OOPIFs.

third_party/WebKit/Source/platform/testing/WebLayerTreeViewImplForTesting.h

 // Copyright 2013 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 WebLayerTreeViewImplForTesting_h
 #define WebLayerTreeViewImplForTesting_h
 
 #include "cc/test/test_task_graph_runner.h"
 #include "cc/trees/layer_tree_host_client.h"
 #include "cc/trees/layer_tree_host_single_thread_client.h"
@@ skipping 77 matching lines @@
                                          bool has_scrolled_by_touch) override;
   void RequestNewCompositorFrameSink() override;
   void DidInitializeCompositorFrameSink() override {}
   void DidFailToInitializeCompositorFrameSink() override;
   void WillCommit() override {}
   void DidCommit() override {}
   void DidCommitAndDrawFrame() override {}
   void DidReceiveCompositorFrameAck() override {}
   void DidCompletePageScaleAnimation() override {}
 
+  bool IsForSubframe() override;
+
   // cc::LayerTreeHostSingleThreadClient implementation.
   void DidSubmitCompositorFrame() override {}
   void DidLoseCompositorFrameSink() override {}
 
  private:
   cc::TestTaskGraphRunner task_graph_runner_;
   std::unique_ptr<cc::AnimationHost> animation_host_;
   std::unique_ptr<cc::LayerTreeHost> layer_tree_host_;
 };
 
 }  // namespace blink
 
 #endif  // WebLayerTreeViewImplForTesting_h