Make IsTriggerableEvent take Event objects and use it to verify whether tap events should trigger.

ui/views/controls/button/custom_button.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_CONTROLS_BUTTON_CUSTOM_BUTTON_H_
 #define UI_VIEWS_CONTROLS_BUTTON_CUSTOM_BUTTON_H_
 #pragma once
 
 #include "ui/base/animation/animation_delegate.h"
 #include "ui/base/events.h"
@@ skipping 92 matching lines @@
   explicit CustomButton(ButtonListener* listener);
 
   // Invoked from SetState() when SetState() is passed a value that differs from
   // the current state. CustomButton's implementation of StateChanged() does
   // nothing; this method is provided for subclasses that wish to do something
   // on state changes.
   virtual void StateChanged();
 
   // Returns true if the event is one that can trigger notifying the listener.
   // This implementation returns true if the left mouse button is down.
-  virtual bool IsTriggerableEvent(const MouseEvent& event);
+  virtual bool IsTriggerableEvent(const Event& event);
 
   // Returns true if the button should become pressed when the user
   // holds the mouse down over the button. For this implementation,
   // we simply return IsTriggerableEvent(event).
-  virtual bool ShouldEnterPushedState(const MouseEvent& event);
+  virtual bool ShouldEnterPushedState(const Event& event);
 
   // Overridden from View:
   virtual void ViewHierarchyChanged(bool is_add,
                                     View* parent,
                                     View* child) OVERRIDE;
   virtual void OnBlur() OVERRIDE;
 
   // The button state (defined in implementation)
   ButtonState state_;
 
@@ skipping 12 matching lines @@
 
   // See description above setter.
   bool request_focus_on_press_;
 
   DISALLOW_COPY_AND_ASSIGN(CustomButton);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_BUTTON_CUSTOM_BUTTON_H_