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

chrome/test/ui/ui_test.cc

 // 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/test/ui/ui_test.h"
 
 #if defined(OS_POSIX)
 #include <signal.h>
 #include <sys/types.h>
 #endif
 
 #include <set>
 #include <vector>
 
 #include "base/base_switches.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/environment.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
-#include "base/json/json_value_serializer.h"
+#include "base/json/json_file_value_serializer.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
 #include "base/process_util.h"
 #include "base/scoped_temp_dir.h"
 #include "base/string_number_conversions.h"
 #include "base/string_split.h"
 #include "base/test/test_file_util.h"
 #include "base/test/test_timeouts.h"
 #include "base/threading/platform_thread.h"
 #include "base/time.h"
@@ skipping 776 matching lines @@
     base::PlatformThread::Sleep(kDelay);
   }
 
   LOG(INFO) << "Elapsed time: " << (base::Time::Now() - start).InSecondsF()
             << " seconds"
             << " call failed " << fail_count << " times"
             << " state was incorrect " << incorrect_state_count << " times";
   ADD_FAILURE() << "Timeout reached in " << __FUNCTION__;
   return false;
 }