Block internal PlatformEvents before they are dispatched in touchview.

ash/wm/maximize_mode/internal_input_device_list_x11.h

Index: ash/wm/maximize_mode/internal_input_device_list_x11.h
diff --git a/ash/wm/maximize_mode/internal_input_device_list_x11.h b/ash/wm/maximize_mode/internal_input_device_list_x11.h
index 3ef0de8fd11a20d9c7eb9535314df7cbbeb3d189..0f5c920a49bc7a4107faef31d9493671ac12e325 100644
--- a/ash/wm/maximize_mode/internal_input_device_list_x11.h
+++ b/ash/wm/maximize_mode/internal_input_device_list_x11.h
@@ -7,29 +7,28 @@
 
 #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);
 };