Removed (spurious, touch-initiated) tooltips from nav buttons

ui/views/corewm/tooltip_controller.h

 // 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.
 
 #ifndef UI_VIEWS_COREWM_TOOLTIP_CONTROLLER_H_
 #define UI_VIEWS_COREWM_TOOLTIP_CONTROLLER_H_
 
 #include <map>
 #include <memory>
 
@@ skipping 93 matching lines @@
 
   std::unique_ptr<Tooltip> tooltip_;
 
   // Timer for requesting delayed updates of the tooltip.
   base::OneShotTimer tooltip_defer_timer_;
 
   // Timer to timeout the life of an on-screen tooltip. We hide the tooltip when
   // this timer fires.
   base::OneShotTimer tooltip_shown_timer_;
 
-  // Location of the last event in |tooltip_window_|'s coordinates.
+  // Location of the last events in |tooltip_window_|'s coordinates.
   gfx::Point curr_mouse_loc_;
+  gfx::Point last_touch_loc_;
 
   bool tooltips_enabled_;
 
   // An indicator of whether tooltip appears with delay or not.
   // If the flag is true, tooltip shows up with delay;
   // otherwise there is no delay, which is used in unit tests only.
   bool tooltip_show_delayed_;
 
   std::map<aura::Window*, int> tooltip_shown_timeout_map_;
 
   DISALLOW_COPY_AND_ASSIGN(TooltipController);
 };
 
 }  // namespace corewm
 }  // namespace views
 
 #endif  // UI_VIEWS_COREWM_TOOLTIP_CONTROLLER_H_