views: Target the synthetic wheel events to the view under the mouse cursor.

ui/views/controls/menu/menu_host_root_view.cc

 // 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 "ui/views/controls/menu/menu_host_root_view.h"
 
 #include "ui/views/controls/menu/menu_controller.h"
 #include "ui/views/controls/menu/submenu_view.h"
 
 namespace views {
@@ skipping 44 matching lines @@
       GetMenuController()->OnMouseWheel(submenu_, event);
 #else
   // Windows uses focus_util_win::RerouteMouseWheel to forward events to
   // the right menu.
   // RootView::OnMouseWheel forwards to the focused view. We don't have a
   // focused view, so we need to override this then forward to the menu.
   return submenu_->OnMouseWheel(event);
 #endif
 }
 
-void MenuHostRootView::DispatchGestureEvent(
-    ui::GestureEvent* event) {
+void MenuHostRootView::DispatchGestureEvent(ui::GestureEvent* event) {
   RootView::DispatchGestureEvent(event);
   if (event->handled())
     return;
   // ChromeOS uses MenuController to forward events like other
   // mouse events.
   if (!GetMenuController())
     return;
   GetMenuController()->OnGestureEvent(submenu_, event);
 }
 
 MenuController* MenuHostRootView::GetMenuController() {
   return submenu_ ? submenu_->GetMenuItem()->GetMenuController() : NULL;
 }
 
 }  // namespace views