Add a flag to allow renderer to use software compositor when GL compositor doesn't work.

content/shell/webkit_test_controller.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 "content/shell/webkit_test_controller.h"
 
 #include <iostream>
 
 #include "base/base64.h"
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
 #include "content/public/browser/devtools_manager.h"
 #include "content/public/browser/gpu_data_manager.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_view.h"
+#include "content/public/common/content_switches.h"
 #include "content/shell/common/shell_messages.h"
 #include "content/shell/common/shell_switches.h"
 #include "content/shell/common/webkit_test_helpers.h"
 #include "content/shell/shell.h"
 #include "content/shell/shell_browser_context.h"
 #include "content/shell/shell_content_browser_client.h"
 #include "webkit/support/webkit_support_gfx.h"
 
 namespace content {
 
@@ skipping 584 matching lines @@
   }
   base::MessageLoop::current()->RunUntilIdle();
 }
 
 void WebKitTestController::OnResetDone() {
   base::MessageLoop::current()->PostTask(FROM_HERE,
                                          base::MessageLoop::QuitClosure());
 }
 
 }  // namespace content