Notify OverscrollController of gesture events in plugins.

content/browser/renderer_host/render_widget_host_view_aura.h

Index: content/browser/renderer_host/render_widget_host_view_aura.h
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.h b/content/browser/renderer_host/render_widget_host_view_aura.h
index f3d0eafaa7c80d177efe8fe2a4f60ed8e8ce0bb0..e254928479fbc2a0bf87ba1995d58b99f0003115 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.h
+++ b/content/browser/renderer_host/render_widget_host_view_aura.h
@@ -157,6 +157,8 @@ class CONTENT_EXPORT RenderWidgetHostViewAura
       override;
   InputEventAckState FilterInputEvent(
       const blink::WebInputEvent& input_event) override;
+  InputEventAckState FilterChildGestureEvent(
+      const blink::WebGestureEvent& gesture_event) override;
   BrowserAccessibilityManager* CreateBrowserAccessibilityManager(
       BrowserAccessibilityDelegate* delegate, bool for_root_frame) override;
   gfx::AcceleratedWidget AccessibilityGetAcceleratedWidget() override;
@@ -294,6 +296,11 @@ class CONTENT_EXPORT RenderWidgetHostViewAura
   // Sets whether the overscroll controller should be enabled for this page.
   void SetOverscrollControllerEnabled(bool enabled);
 
+  // TODO(mcnee): Tests needing this are BrowserPlugin specific. Remove after
+  // removing BrowserPlugin (crbug.com/533069).
+  void SetOverscrollControllerForTesting(
+      std::unique_ptr<OverscrollController> controller);
+
   void SnapToPhysicalPixelBoundary();
 
   // Called when the context menu is about to be displayed.