Move blink platform's JSON code into a directory.

third_party/WebKit/Source/platform/JSONParser.h

Index: third_party/WebKit/Source/platform/JSONParser.h
diff --git a/third_party/WebKit/Source/platform/JSONParser.h b/third_party/WebKit/Source/platform/JSONParser.h
deleted file mode 100644
index b208d91474c94d1b25a4948bc46356d9ccd4a9e9..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/platform/JSONParser.h
+++ /dev/null
@@ -1,21 +0,0 @@
-// Copyright 2016 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.
-
-#ifndef JSONParser_h
-#define JSONParser_h
-
-#include "platform/PlatformExport.h"
-#include "wtf/text/WTFString.h"
-
-#include <memory>
-
-namespace blink {
-
-class JSONValue;
-
-PLATFORM_EXPORT std::unique_ptr<JSONValue> parseJSON(const String& json);
-
-} // namespace blink
-
-#endif // JSONParser_h