Break two classes defined in json_value_serializer.cc, .h into separate files.
This will allow the use of JSONStringValueSerializer in the NaCl sandbox.
BUG=none
TEST=none
Review URL: https://chromiumcodereview.appspot.com/9465030

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@123701 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/extensions/extension_service_unittest.cc b/chrome/browser/extensions/extension_service_unittest.cc
index bcc2ae0c..b5d25fa3 100644
--- a/chrome/browser/extensions/extension_service_unittest.cc
+++ b/chrome/browser/extensions/extension_service_unittest.cc
@@ -12,8 +12,9 @@
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
+#include "base/json/json_file_value_serializer.h"
 #include "base/json/json_reader.h"
-#include "base/json/json_value_serializer.h"
+#include "base/json/json_string_value_serializer.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop.h"