make content_shell and content_browsertests works with aura

content/test/content_test_launcher.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/test_launcher.h"
 
 #include "base/base_paths.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/path_service.h"
@@ skipping 114 matching lines @@
     return true;
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ContentTestLauncherDelegate);
 };
 
 }  // namespace content
 
 int main(int argc, char** argv) {
-#if defined(USE_AURA)
-  LOG(INFO) << "content_browsertests not supported on aura yet.";
-  return 0;
-#endif
   content::ContentTestLauncherDelegate launcher_delegate;
   return test_launcher::LaunchTests(&launcher_delegate, argc, argv);
 }