Aura tooltips do not move on mouse move in case of many neighboring views with the same label

ui/views/widget/tooltip_manager_aura.h

 // Copyright (c) 2011 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.
 
 #ifndef UI_VIEWS_WIDGET_TOOLTIP_MANAGER_AURA_H_
 #define UI_VIEWS_WIDGET_TOOLTIP_MANAGER_AURA_H_
 
 #include "base/compiler_specific.h"
 #include "base/strings/string16.h"
 #include "ui/gfx/point.h"
+#include "ui/gfx/rect.h"
 #include "ui/views/widget/tooltip_manager.h"
 
 namespace aura {
 class Window;
 }
 
 namespace gfx {
 class FontList;
 }
 
 namespace views {
 
+class View;
 class Widget;
 
 // TooltipManager implementation for Aura.
 class TooltipManagerAura : public TooltipManager {
  public:
   explicit TooltipManagerAura(Widget* widget);
   virtual ~TooltipManagerAura();
 
   // If |source| has capture this finds the Widget under the mouse and invokes
   // UpdateTooltip() on it's TooltipManager. This is necessary as when capture
@@ skipping 14 matching lines @@
   void UpdateTooltipForTarget(View* target,
                               const gfx::Point& point,
                               aura::Window* root_window);
 
   // Returns the Window the tooltip text is installed on.
   aura::Window* GetWindow();
 
   Widget* widget_;
   base::string16 tooltip_text_;
 
+  // Bounds of the view for which the last managed tooltip was displayed.
+  gfx::Rect origin_bounds_;
+
   DISALLOW_COPY_AND_ASSIGN(TooltipManagerAura);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_TOOLTIP_MANAGER_AURA_H_