[content shell] Always use the osmesa driver for layout tests, and disable the gpu blacklist

content/shell/shell_main_delegate.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/shell_main_delegate.h"
 
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "content/public/browser/browser_main_runner.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/url_constants.h"
 #include "content/shell/shell_browser_main.h"
 #include "content/shell/shell_content_browser_client.h"
 #include "content/shell/shell_content_renderer_client.h"
 #include "content/shell/shell_switches.h"
 #include "content/shell/webkit_test_platform_support.h"
 #include "net/cookies/cookie_monster.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/ui_base_paths.h"
+#include "ui/gl/gl_switches.h"
 
 #if defined(OS_ANDROID)
 #include "base/global_descriptors_posix.h"
 #include "content/shell/android/shell_descriptors.h"
 #endif
 
 #if defined(OS_MACOSX)
 #include "content/shell/paths_mac.h"
 #endif  // OS_MACOSX
 
@@ skipping 54 matching lines @@
 #endif
 
   InitLogging();
   if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kDumpRenderTree)) {
     CommandLine::ForCurrentProcess()->AppendSwitch(
         switches::kAllowUniversalAccessFromFiles);
     CommandLine::ForCurrentProcess()->AppendSwitch(
         switches::kAllowFileAccessFromFiles);
     CommandLine::ForCurrentProcess()->AppendSwitch(
         switches::kForceCompositingMode);
+    CommandLine::ForCurrentProcess()->AppendSwitchASCII(
+        switches::kUseGL, gfx::kGLImplementationOSMesaName);
+    CommandLine::ForCurrentProcess()->AppendSwitch(
+        switches::kIgnoreGpuBlacklist);
     net::CookieMonster::EnableFileScheme();
     if (!WebKitTestPlatformInitialize()) {
       if (exit_code)
         *exit_code = 1;
       return true;
     }
   }
   SetContentClient(&content_client_);
   return false;
 }
@@ skipping 63 matching lines @@
   browser_client_.reset(new ShellContentBrowserClient);
   return browser_client_.get();
 }
 
 ContentRendererClient* ShellMainDelegate::CreateContentRendererClient() {
   renderer_client_.reset(new ShellContentRendererClient);
   return renderer_client_.get();
 }
 
 }  // namespace content