input: Remove dead code.

content/browser/frame_host/render_widget_host_view_child_frame.cc

 // 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.
 
 #include "content/browser/frame_host/render_widget_host_view_child_frame.h"
 
 #include <algorithm>
 #include <utility>
 #include <vector>
 
@@ skipping 740 matching lines @@
   // We may be the owner of a RenderWidgetHostViewGuest,
   // so we talk to the root RWHV on its behalf.
   // TODO(mcnee): Remove once MimeHandlerViewGuest is based on OOPIF.
   // See crbug.com/659750
   if (frame_connector_)
     return frame_connector_->GetRootRenderWidgetHostView()
         ->FilterChildGestureEvent(gesture_event);
   return INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
 }
 
-void RenderWidgetHostViewChildFrame::OnSetNeedsFlushInput() {
-  NOTIMPLEMENTED();
-}
-
 BrowserAccessibilityManager*
 RenderWidgetHostViewChildFrame::CreateBrowserAccessibilityManager(
     BrowserAccessibilityDelegate* delegate, bool for_root_frame) {
   return BrowserAccessibilityManager::Create(
       BrowserAccessibilityManager::GetEmptyDocument(), delegate);
 }
 
 void RenderWidgetHostViewChildFrame::ClearCompositorSurfaceIfNecessary() {
   if (!support_)
     return;
@@ skipping 69 matching lines @@
     auto origin = GetViewBounds().origin() -
                   frame_connector_->GetRootRenderWidgetHostView()
                       ->GetViewBounds()
                       .origin();
     return gfx::Point(origin.x(), origin.y());
   }
   return gfx::Point();
 }
 
 }  // namespace content