Rewrite references to "wtf/" to "platform/wtf/" in platform/json.

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/json/JSONParser.h"
 
 #include "platform/json/JSONValues.h"
+#include "platform/wtf/text/StringBuilder.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;
   String strVal;
   int intVal = 0;
 
@@ skipping 521 matching lines @@
     evil.append('[');
   for (int i = 0; i < 1001; ++i)
     evil.append(']');
   root = parseJSON(evil.toString());
   EXPECT_FALSE(root.get());
   root = parseJSON(evil.toString(), 1001);
   EXPECT_FALSE(root.get());
 }
 
 }  // namespace blink