Enable immersive fullscreen on Windows Ash.

ui/wm/core/compound_event_filter.cc

 // 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.
 
 #include "ui/wm/core/compound_event_filter.h"
 
 #include "base/containers/hash_tables.h"
 #include "base/logging.h"
 #include "ui/aura/client/activation_client.h"
 #include "ui/aura/client/cursor_client.h"
@@ skipping 273 matching lines @@
   }
 }
 
 void CompoundEventFilter::OnGestureEvent(ui::GestureEvent* event) {
   if (handlers_.might_have_observers()) {
     ObserverListBase<ui::EventHandler>::Iterator it(handlers_);
     ui::EventHandler* handler;
     while (!event->stopped_propagation() && (handler = it.GetNext()) != NULL)
       handler->OnGestureEvent(event);
   }
+
+#if defined(OS_WIN)
+  // A Win8 edge swipe event is a special event that does not have location
+  // information associated with it, and is not preceeded by an ET_TOUCH_PRESSED
+  // event.  So we treat it specially here.
+  if (!event->handled() && event->type() == ui::ET_GESTURE_WIN8_EDGE_SWIPE &&
+      !aura::Env::GetInstance()->IsMouseButtonDown()) {
+    SetMouseEventsEnableStateOnEvent(
+        static_cast<aura::Window*>(event->target()), event, false);
+  }
+#endif
 }
 
 }  // namespace wm