Remove calls to deprecated MessageLoop methods in third_party.

third_party/WebKit/Source/platform/testing/UnitTestHelpers.cpp

 /*
  * Copyright (C) 2013 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 11 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "platform/testing/UnitTestHelpers.h"
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
+#include "base/run_loop.h"
 #include "platform/SharedBuffer.h"
 #include "platform/Timer.h"
 #include "platform/heap/Handle.h"
 #include "public/platform/FilePathConversion.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebString.h"
 #include "public/platform/WebTaskRunner.h"
 #include "public/platform/WebThread.h"
 #include "public/platform/WebTraceLocation.h"
 #include "wtf/text/StringUTF8Adaptor.h"
@@ skipping 30 matching lines @@
 PassRefPtr<SharedBuffer> readFromFile(const String& path)
 {
     base::FilePath filePath = blink::WebStringToFilePath(path);
     std::string buffer;
     base::ReadFileToString(filePath, &buffer);
     return SharedBuffer::create(buffer.data(), buffer.size());
 }
 
 void enterRunLoop()
 {
-    base::MessageLoop::current()->Run();
+    base::RunLoop().Run();
 }
 
 void exitRunLoop()
 {
     base::MessageLoop::current()->QuitWhenIdle();
 }
 
 void yieldCurrentThread()
 {
     base::PlatformThread::YieldCurrentThread();
 }
 
 } // namespace testing
 } // namespace blink