Fully support the autohide shelf option for touch UI on Windows.

win8/metro_driver/chrome_app_view_ash.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 "win8/metro_driver/stdafx.h"
 #include "win8/metro_driver/chrome_app_view_ash.h"
 
 #include <corewindow.h>
 #include <shellapi.h>
 #include <windows.foundation.h>
@@ skipping 1270 matching lines @@
   ui_loop_.PostTask(FROM_HERE,
                     base::Bind(&ChromeAppViewAsh::OnNavigateToUrl,
                                base::Unretained(this),
                                actual_url));
   return S_OK;
 }
 
 HRESULT ChromeAppViewAsh::OnEdgeGestureCompleted(
     winui::Input::IEdgeGesture* gesture,
     winui::Input::IEdgeGestureEventArgs* args) {
-  // Swipe from edge gesture (and win+z) is equivalent to pressing F11.
-  // TODO(cpu): Make this cleaner for m33.
-  ui_channel_->Send(new MetroViewerHostMsg_KeyDown(VK_F11, 1, 0, 0));
-  ::Sleep(15);
-  ui_channel_->Send(new MetroViewerHostMsg_KeyUp(VK_F11, 1, 0, 0));
+  ui_channel_->Send(new MetroViewerHostMsg_EdgeGesture());
   return S_OK;
 }
 
 void ChromeAppViewAsh::OnSearchRequest(const base::string16& search_string) {
   DCHECK(ui_channel_);
   ui_channel_->Send(new MetroViewerHostMsg_SearchRequest(search_string));
 }
 
 void ChromeAppViewAsh::OnNavigateToUrl(const base::string16& url) {
   DCHECK(ui_channel_);
@@ skipping 29 matching lines @@
   mswr::ComPtr<winapp::Core::ICoreApplicationExit> app_exit;
   CheckHR(core_app.As(&app_exit));
   globals.app_exit = app_exit.Detach();
 }
 
 IFACEMETHODIMP
 ChromeAppViewFactory::CreateView(winapp::Core::IFrameworkView** view) {
   *view = mswr::Make<ChromeAppViewAsh>().Detach();
   return (*view) ? S_OK :  E_OUTOFMEMORY;
 }