adds WARP support to Chromium, for Metro mode only, on Windows 8

chrome/browser/lifetime/application_lifetime_win.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 "chrome/browser/lifetime/application_lifetime.h"
 
 #include "base/bind.h"
 #include "base/prefs/pref_service.h"
 #include "base/win/metro.h"
 #include "base/win/windows_version.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/first_run/upgrade_util.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/common/pref_names.h"
+#include "content/public/browser/gpu_data_manager.h"
 #include "ui/views/widget/widget.h"
 
 #if defined(USE_AURA)
 #include "base/environment.h"
 #include "base/files/file_path.h"
 #include "base/path_service.h"
 #include "chrome/browser/metro_utils/metro_chrome_win.h"
 #include "chrome/browser/metro_viewer/chrome_metro_viewer_process_host_aurawin.h"
 #include "chrome/browser/shell_integration.h"
 #include "chrome/common/chrome_constants.h"
@@ skipping 65 matching lines @@
   // to send an IPC to the viewer to do the ShellExecute.
   ChromeMetroViewerProcessHost::HandleActivateDesktop(
       path, ash_execution_status == ASH_TERMINATE);
 }
 #endif
 
 void AttemptRestartToDesktopMode() {
   PrefService* prefs = g_browser_process->local_state();
   prefs->SetString(prefs::kRelaunchMode,
                    upgrade_util::kRelaunchModeDesktop);
-
+  content::GpuDataManager::GetInstance()->SetShouldUseWarp(false);
   AttemptRestart();
 }
 
 void AttemptRestartToMetroMode() {
   PrefService* prefs = g_browser_process->local_state();
   prefs->SetString(prefs::kRelaunchMode,
                    upgrade_util::kRelaunchModeMetro);
+  // If we cannot use the GPU on this device we enable WARP software rendering
+  // for Metro mode, so we can use Metro mode which requires a Gpu.
+  if (!content::GpuDataManager::GetInstance()->GpuAccessAllowed(NULL)) {

[sky, 2014/08/20 22:37:03]

nit: no {}

[luken, 2014/08/27 20:43:46]

Deprecated code.

+    content::GpuDataManager::GetInstance()->SetShouldUseWarp(true);
+  }
   AttemptRestart();
 }
 
 }  // namespace chrome