mac content shell drt: Hook up a dummy image transport

content/test/layouttest_support.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/public/test/layouttest_support.h"
 
 #include "base/callback.h"
 #include "base/lazy_instance.h"
+#include "content/common/gpu/image_transport_surface.h"
 #include "content/renderer/devtools/devtools_client.h"
 #include "content/renderer/render_view_impl.h"
 #include "content/renderer/renderer_webapplicationcachehost_impl.h"
 #include "content/renderer/renderer_webkitplatformsupport_impl.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebGamepads.h"
 #include "third_party/WebKit/Tools/DumpRenderTree/chromium/TestRunner/public/WebTestProxy.h"
 
 using WebKit::WebGamepads;
 using WebTestRunner::WebTestProxy;
 using WebTestRunner::WebTestProxyBase;
@@ skipping 35 matching lines @@
 
 void EnableDevToolsFrontendTesting() {
   DevToolsClient::EnableDevToolsFrontendTesting();
 }
 
 int GetLocalSessionHistoryLength(RenderView* render_view) {
   return static_cast<RenderViewImpl*>(render_view)
       ->GetLocalSessionHistoryLengthForTesting();
 }
 
+void SetAllowOSMesaImageTransportForTesting() {
+#if defined(OS_MACOSX)
+  ImageTransportSurface::SetAllowOSMesaForTesting(true);
+#endif
+}
+
 }  // namespace content