Block internal PlatformEvents before they are dispatched in touchview.

ash/wm/maximize_mode/internal_input_device_list_x11.h

 // Copyright 2014 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 ASH_WM_MAXIMIZE_MODE_INTERNAL_INPUT_DEVICE_LIST_X11_H_
 #define ASH_WM_MAXIMIZE_MODE_INTERNAL_INPUT_DEVICE_LIST_X11_H_
 
 #include <set>
 
+#include "ash/ash_export.h"
 #include "ash/wm/maximize_mode/internal_input_device_list.h"
 #include "base/macros.h"
 
-namespace ui {
-class Event;
-}
-
 namespace ash {
 
 // Identifies which input devices are internal and provides a helper function to
 // test if an input event came from an internal device.
-class InternalInputDeviceListX11 : public InternalInputDeviceList {
+class ASH_EXPORT InternalInputDeviceListX11 : public InternalInputDeviceList {
  public:
   InternalInputDeviceListX11();
   virtual ~InternalInputDeviceListX11();
 
   // InternalInputDeviceList:
-  virtual bool IsEventFromInternalDevice(const ui::Event* event) OVERRIDE;
+  virtual bool IsEventFromInternalDevice(
+      const ui::PlatformEvent& event) OVERRIDE;
 
- private:
+ protected:
   // Tracks the device ids of internal input devices.
   std::set<int> internal_device_ids_;
 
+ private:
   DISALLOW_COPY_AND_ASSIGN(InternalInputDeviceListX11);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_MAXIMIZE_MODE_INTERNAL_INPUT_DEVICE_LIST_X11_H_