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

chrome/browser/gpu/gl_string_manager.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/gpu/gl_string_manager.h"
-
-#include "base/prefs/pref_registry_simple.h"
-#include "base/prefs/pref_service.h"
-#include "chrome/browser/browser_process.h"
-#include "chrome/common/pref_names.h"
-#include "content/public/browser/gpu_data_manager.h"
-
-// static
-void GLStringManager::RegisterPrefs(PrefRegistrySimple* registry) {
-  registry->RegisterStringPref(prefs::kGLVendorString, std::string());
-  registry->RegisterStringPref(prefs::kGLRendererString, std::string());
-  registry->RegisterStringPref(prefs::kGLVersionString, std::string());
-}
-
-GLStringManager::GLStringManager() {
-}
-
-GLStringManager::~GLStringManager() {
-}
-
-void GLStringManager::Initialize() {
-  // On MacOSX or Windows, preliminary GPUInfo is enough.
-#if defined(OS_LINUX)
-  // We never remove this observer from GpuDataManager.
-  content::GpuDataManager::GetInstance()->AddObserver(this);
-
-  PrefService* local_state = g_browser_process->local_state();
-  if (!local_state)
-    return;
-
-  gl_vendor_ = local_state->GetString(prefs::kGLVendorString);
-  gl_renderer_ = local_state->GetString(prefs::kGLRendererString);
-  gl_version_ = local_state->GetString(prefs::kGLVersionString);
-
-  if (!gl_vendor_.empty() || !gl_renderer_.empty() || !gl_version_.empty()) {
-    content::GpuDataManager::GetInstance()->SetGLStrings(
-        gl_vendor_, gl_renderer_, gl_version_);
-  }
-#endif
-}
-
-void GLStringManager::OnGpuInfoUpdate() {
-  std::string gl_vendor, gl_renderer, gl_version;
-  content::GpuDataManager::GetInstance()->GetGLStrings(
-      &gl_vendor, &gl_renderer, &gl_version);
-
-  PrefService* local_state = g_browser_process->local_state();
-  if (!local_state)
-    return;
-
-  if (!gl_vendor.empty() && gl_vendor != gl_vendor_) {
-    gl_vendor_ = gl_vendor;
-    local_state->SetString(prefs::kGLVendorString, gl_vendor_);
-  }
-  if (!gl_renderer.empty() && gl_renderer != gl_renderer_) {
-    gl_renderer_ = gl_renderer;
-    local_state->SetString(prefs::kGLRendererString, gl_renderer_);
-  }
-  if (!gl_version.empty() && gl_version != gl_version_) {
-    gl_version_ = gl_version;
-    local_state->SetString(prefs::kGLVersionString, gl_version_);
-  }
-}
-