Move OverscrollController to RenderWidgetHostViewAura

content/browser/renderer_host/render_widget_host_view_mac.mm

 // 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.
 
 #include "content/browser/renderer_host/render_widget_host_view_mac.h"
 
 #import <objc/runtime.h>
 #include <QuartzCore/QuartzCore.h>
 
 #include "base/basictypes.h"
@@ skipping 2036 matching lines @@
   mouse_locked_ = false;
 
   // Unlock position of mouse cursor and unhide it.
   CGAssociateMouseAndMouseCursorPosition(YES);
   [NSCursor unhide];
 
   if (render_widget_host_)
     render_widget_host_->LostMouseLock();
 }
 
-void RenderWidgetHostViewMac::UnhandledWheelEvent(
-    const blink::WebMouseWheelEvent& event) {
+void RenderWidgetHostViewMac::WheelEventAck(
+    const blink::WebMouseWheelEvent& event,
+    InputEventAckState ack_result) {
+  if (ack_result == INPUT_EVENT_ACK_STATE_CONSUMED)
+    return;
+
   // Only record a wheel event as unhandled if JavaScript handlers got a chance
   // to see it (no-op wheel events are ignored by the event dispatcher)
   if (event.deltaX || event.deltaY)
     [cocoa_view_ gotUnhandledWheelEvent];
 }
 
 bool RenderWidgetHostViewMac::Send(IPC::Message* message) {
   if (render_widget_host_)
     return render_widget_host_->Send(message);
   delete message;
@@ skipping 2400 matching lines @@
   }
 }
 
 - (void)disableRendering {
   // Disable the fade-out animation as the layer is removed.
   ScopedCAActionDisabler disabler;
   [self removeFromSuperlayer];
 }
 
 @end  // implementation SoftwareLayer