Moved JsonPrefStore to use SequencedWorkerPool

chrome/browser/extensions/test_extension_prefs.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_TEST_EXTENSION_PREFS_H_
 #define CHROME_BROWSER_EXTENSIONS_TEST_EXTENSION_PREFS_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/scoped_temp_dir.h"
 #include "chrome/common/extensions/extension.h"
 
 class ExtensionPrefValueMap;
 class PrefService;
 
 namespace base {
 class DictionaryValue;
+class SequencedTaskRunner;
 }
 
 namespace extensions {
 class ExtensionPrefs;
 
 // This is a test class intended to make it easier to work with ExtensionPrefs
 // in tests.
 class TestExtensionPrefs {
  public:
-  TestExtensionPrefs();
+  explicit TestExtensionPrefs(base::SequencedTaskRunner* task_runner);
   virtual ~TestExtensionPrefs();
 
   ExtensionPrefs* prefs() { return prefs_.get(); }
   const ExtensionPrefs& const_prefs() const {
       return *prefs_.get();
   }
   PrefService* pref_service() { return pref_service_.get(); }
   const FilePath& temp_dir() const { return temp_dir_.path(); }
 
   // This will cause the ExtensionPrefs to be deleted and recreated, based on
@@ skipping 30 matching lines @@
   // active after calling RecreateExtensionPrefs(). Defaults to false.
   void set_extensions_disabled(bool extensions_disabled);
 
  protected:
   ScopedTempDir temp_dir_;
   FilePath preferences_file_;
   FilePath extensions_dir_;
   scoped_ptr<PrefService> pref_service_;
   scoped_ptr<ExtensionPrefs> prefs_;
   scoped_ptr<ExtensionPrefValueMap> extension_pref_value_map_;
+  const scoped_refptr<base::SequencedTaskRunner> task_runner_;
 
  private:
   bool extensions_disabled_;
   DISALLOW_COPY_AND_ASSIGN(TestExtensionPrefs);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_TEST_EXTENSION_PREFS_H_