Adds swipe edge gesture to metro Ash

win8/metro_driver/chrome_app_view_ash.h

Index: win8/metro_driver/chrome_app_view_ash.h
===================================================================
--- win8/metro_driver/chrome_app_view_ash.h	(revision 235015)
+++ win8/metro_driver/chrome_app_view_ash.h	(working copy)
@@ -121,6 +121,9 @@
   // Helper to handle http/https url requests in ASH.
   HRESULT HandleProtocolRequest(winapp::Activation::IActivatedEventArgs* args);
 
+  HRESULT OnEdgeGestureCompleted(winui::Input::IEdgeGesture* gesture,
+                                 winui::Input::IEdgeGestureEventArgs* args);
+
   // Tasks posted to the UI thread to initiate the search/url navigation
   // requests.
   void OnSearchRequest(const string16& search_string);
@@ -143,6 +146,7 @@
   EventRegistrationToken accel_keyup_token_;
   EventRegistrationToken window_activated_token_;
   EventRegistrationToken sizechange_token_;
+  EventRegistrationToken edgeevent_token_;
 
   // Keep state about which button is currently down, if any, as PointerMoved
   // events do not contain that state, but Ash's MouseEvents need it.