MacViews: Clear mouse handler when showing context menus.

ui/views/controls/menu/menu_controller.cc

Index: ui/views/controls/menu/menu_controller.cc
diff --git a/ui/views/controls/menu/menu_controller.cc b/ui/views/controls/menu/menu_controller.cc
index 7281b18a38ce8528e1459f182c0bc37fe674af0d..d26ff6654de2f9732637ebeacf3bc800e7d8775f 100644
--- a/ui/views/controls/menu/menu_controller.cc
+++ b/ui/views/controls/menu/menu_controller.cc
@@ -401,13 +401,9 @@ MenuItemView* MenuController::Run(Widget* parent,
   menu_start_time_ = base::TimeTicks::Now();
   menu_start_mouse_press_loc_ = gfx::Point();
 
-  // If we are shown on mouse press, we will eat the subsequent mouse down and
-  // the parent widget will not be able to reset its state (it might have mouse
-  // capture from the mouse down). So we clear its state here.
   if (parent) {
     View* root_view = parent->GetRootView();
     if (root_view) {
-      root_view->SetMouseHandler(NULL);
       const ui::Event* event =
           static_cast<internal::RootView*>(root_view)->current_event();
       if (event && event->type() == ui::ET_MOUSE_PRESSED) {