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

chrome/browser/lifetime/application_lifetime_win.cc

Index: chrome/browser/lifetime/application_lifetime_win.cc
diff --git a/chrome/browser/lifetime/application_lifetime_win.cc b/chrome/browser/lifetime/application_lifetime_win.cc
index 02c0019828455ebb2f53bbe4df4f8bf097913a0f..b15c15d9495ef32017b59edad33dd554ff153892 100644
--- a/chrome/browser/lifetime/application_lifetime_win.cc
+++ b/chrome/browser/lifetime/application_lifetime_win.cc
@@ -12,6 +12,7 @@
 #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)
@@ -97,7 +98,7 @@ void AttemptRestartToDesktopMode() {
   PrefService* prefs = g_browser_process->local_state();
   prefs->SetString(prefs::kRelaunchMode,
                    upgrade_util::kRelaunchModeDesktop);
-
+  content::GpuDataManager::GetInstance()->SetShouldUseWarp(false);
   AttemptRestart();
 }
 
@@ -105,6 +106,11 @@ 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();
 }