Moved JsonPrefStore to use SequencedWorkerPool

chrome/browser/profiles/profile_impl.h

Index: chrome/browser/profiles/profile_impl.h
diff --git a/chrome/browser/profiles/profile_impl.h b/chrome/browser/profiles/profile_impl.h
index e448494c05c9d14b2d8b64c88504b81746c8e07e..742e67fbe0038b06f7fda20ade6ff3ce839ad2e3 100644
--- a/chrome/browser/profiles/profile_impl.h
+++ b/chrome/browser/profiles/profile_impl.h
@@ -34,6 +34,10 @@ class Preferences;
 }
 #endif
 
+namespace base {
+class SequencedTaskRunner;
+}
+
 namespace content {
 class SpeechRecognitionPreferences;
 }
@@ -144,7 +148,8 @@ class ProfileImpl : public Profile,
 
   ProfileImpl(const FilePath& path,
               Delegate* delegate,
-              CreateMode create_mode);
+              CreateMode create_mode,
+              base::SequencedTaskRunner* sequenced_task_runner);
 
   // Does final initialization. Should be called after prefs were loaded.
   void DoFinalInit(bool is_new_profile);