Break two classes defined in json_value_serializer.cc, .h into separate files.

chrome/browser/diagnostics/recon_diagnostics.cc

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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 "chrome/browser/diagnostics/recon_diagnostics.h"
 
 #include <string>
 
 #include "base/file_util.h"
 #include "base/json/json_reader.h"
-#include "base/json/json_value_serializer.h"
+#include "base/json/json_string_value_serializer.h"
 #include "base/stringprintf.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "base/sys_info.h"
 #include "base/path_service.h"
 #include "chrome/browser/diagnostics/diagnostics_test.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_version_info.h"
@@ skipping 393 matching lines @@
   path = path.Append(chrome::kBookmarksFileName);
   return new JSONTest(path, ASCIIToUTF16("BookMarks JSON"), 2 * kOneMeg);
 }
 
 DiagnosticTest* MakeLocalStateTest() {
   FilePath path;
   PathService::Get(chrome::DIR_USER_DATA, &path);
   path = path.Append(chrome::kLocalStateFilename);
   return new JSONTest(path, ASCIIToUTF16("Local State JSON"), 50 * kOneKilo);
 }