gpu: Add extension check when initializing MailboxSync

android_webview/browser/aw_browser_main_parts.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 "android_webview/browser/aw_browser_main_parts.h"
 
 #include "android_webview/browser/aw_browser_context.h"
 #include "android_webview/browser/aw_result_codes.h"
 #include "base/android/build_info.h"
 #include "base/android/memory_pressure_listener_android.h"
+#include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/path_service.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/common/content_client.h"
+#include "content/public/common/content_switches.h"
 #include "content/public/common/result_codes.h"
 #include "content/public/common/url_utils.h"
+#include "gpu/command_buffer/service/mailbox_synchronizer.h"
 #include "net/android/network_change_notifier_factory_android.h"
 #include "net/base/network_change_notifier.h"
 #include "ui/base/l10n/l10n_util_android.h"
 #include "ui/base/layout.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/ui_base_paths.h"
 
 namespace android_webview {
 
 AwBrowserMainParts::AwBrowserMainParts(AwBrowserContext* browser_context)
@@ skipping 25 matching lines @@
       pak_path.AppendASCII("webviewchromium.pak"),
       ui::SCALE_FACTOR_NONE);
 
   base::android::MemoryPressureListenerAndroid::RegisterSystemCallback(
       base::android::AttachCurrentThread());
 
   return content::RESULT_CODE_NORMAL_EXIT;
 }
 
 void AwBrowserMainParts::PreMainMessageLoopRun() {
+  if (!gpu::gles2::MailboxSynchronizer::Initialize()) {
+    CommandLine::ForCurrentProcess()->AppendSwitch(
+        switches::kDisableAccelerated2dCanvas);
+  }
+
   browser_context_->PreMainMessageLoopRun();
   // This is needed for WebView Classic backwards compatibility
   // See crbug.com/298495
   content::SetMaxURLChars(20 * 1024 * 1024);
 }
 
 bool AwBrowserMainParts::MainMessageLoopRun(int* result_code) {
   // Android WebView does not use default MessageLoop. It has its own
   // Android specific MessageLoop.
   return true;
 }
 
 }  // namespace android_webview