Animated scroll shouldn't consume unhandled scrolls for OOPIFs.

ui/compositor/compositor.h

 // Copyright (c) 2012 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 UI_COMPOSITOR_COMPOSITOR_H_
 #define UI_COMPOSITOR_COMPOSITOR_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 325 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 {}
 
   bool IsLocked() { return !active_locks_.empty(); }
 
   void SetOutputIsSecure(bool output_is_secure);
 
   const cc::LayerTreeDebugState& GetLayerTreeDebugState() const;
   void SetLayerTreeDebugState(const cc::LayerTreeDebugState& debug_state);
@@ skipping 62 matching lines @@
 
   base::WeakPtrFactory<Compositor> weak_ptr_factory_;
   base::WeakPtrFactory<Compositor> lock_timeout_weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Compositor);
 };
 
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_COMPOSITOR_H_