Move blink platform's JSON code into a directory.

third_party/WebKit/Source/platform/json/JSONParserTest.cpp

 // Copyright (c) 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.
 
-#include "platform/JSONParser.h"
+#include "platform/json/JSONParser.h"
 
-#include "platform/JSONValues.h"
+#include "platform/json/JSONValues.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "wtf/text/StringBuilder.h"
 
 namespace blink {
 
 TEST(JSONParserTest, Reading)
 {
     JSONValue* tmpValue;
     std::unique_ptr<JSONValue> root;
     std::unique_ptr<JSONValue> root2;
@@ skipping 475 matching lines @@
         "//**/"
     };
 
     for (size_t i = 0; i < WTF_ARRAY_LENGTH(invalidJson); ++i) {
         std::unique_ptr<JSONValue> result = parseJSON(invalidJson[i]);
         EXPECT_FALSE(result.get());
     }
 }
 
 } // namespace blink