Bubble scroll events from WebView guest to embedder.

content/browser/frame_host/render_widget_host_view_guest.h

 // Copyright 2014 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 CONTENT_BROWSER_FRAME_HOST_RENDER_WIDGET_HOST_VIEW_GUEST_H_
 #define CONTENT_BROWSER_FRAME_HOST_RENDER_WIDGET_HOST_VIEW_GUEST_H_
 
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 141 matching lines @@
   // Process all of the given gestures (passes them on to renderer)
   void ProcessGestures(ui::GestureRecognizer::Gestures* gestures);
 
   RenderWidgetHostViewBase* GetOwnerRenderWidgetHostView() const;
 
   void OnHandleInputEvent(RenderWidgetHostImpl* embedder,
                           int browser_plugin_instance_id,
                           const gfx::Rect& guest_window_rect,
                           const blink::WebInputEvent* event);
 
+  void GestureEventAck(const blink::WebGestureEvent& event,
+                       InputEventAckState ack_result) override;
+
+  void WheelEventAck(const blink::WebMouseWheelEvent& event,
+                       InputEventAckState ack_result) override;
+
   // BrowserPluginGuest and RenderWidgetHostViewGuest's lifetimes are not tied
   // to one another, therefore we access |guest_| through WeakPtr.
   base::WeakPtr<BrowserPluginGuest> guest_;
   gfx::Size size_;
   // The platform view for this RenderWidgetHostView.
   // RenderWidgetHostViewGuest mostly only cares about stuff related to
   // compositing, the rest are directly forwared to this |platform_view_|.
   base::WeakPtr<RenderWidgetHostViewBase> platform_view_;
 #if defined(USE_AURA)
   scoped_ptr<ui::GestureRecognizer> gesture_recognizer_;
 #endif
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewGuest);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_RENDER_WIDGET_HOST_VIEW_GUEST_H_