Move ExtensionPrefs and friends to extensions/ directory.

chrome/browser/extensions/api/extension_action/extension_action_prefs_unittest.cc

 // Copyright (c) 2013 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 <string>
 
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
+#include "chrome/browser/extensions/./extension_prefs_unittest.h"
 #include "chrome/browser/extensions/api/extension_action/extension_action_api.h"
-#include "chrome/browser/extensions/extension_prefs_unittest.h"
 #include "extensions/common/extension.h"
 
 namespace extensions {
 
 // Tests force hiding browser actions.
 class ExtensionPrefsHidingBrowserActions : public ExtensionPrefsTest {
  public:
   virtual void Initialize() OVERRIDE {
     // Install 5 extensions.
     for (int i = 0; i < 5; i++) {
@@ skipping 28 matching lines @@
     }
   }
 
  private:
   ExtensionList extensions_;
 };
 
 TEST_F(ExtensionPrefsHidingBrowserActions, ForceHide) {}
 
 }  // namespace extensions