Roll up patch for running layout tests under Aura.

Source/testing/runner/TestInterfaces.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 179 matching lines @@
 }
 
 const vector<WebTestProxyBase*>& TestInterfaces::windowList()
 {
     return m_windowList;
 }
 
 WebThemeEngine* TestInterfaces::themeEngine()
 {
 #if defined(USE_DEFAULT_RENDER_THEME) || !(defined(WIN32) || defined(__APPLE__))
+#if defined(USE_AURA)
+    if (!m_themeEngine.get())
+        m_themeEngine.reset(new WebTestThemeEngineMock());
+    return m_themeEngine.get();
+#else
     return 0;
+#endif
 #elif defined(WIN32)
     if (!m_themeEngine.get())
         m_themeEngine.reset(new WebTestThemeEngineWin());
     return m_themeEngine.get();
 #elif defined(__APPLE__)
     if (!m_themeEngine.get())
         m_themeEngine.reset(new WebTestThemeEngineMac());
     return m_themeEngine.get();
 #endif
 }
 
 }