Move ExtensionPrefs and friends to extensions/ directory.

chrome/browser/extensions/api/preference/preference_api_prefs_unittest.cc

 // Copyright 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/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/prefs/mock_pref_change_callback.h"
 #include "base/values.h"
+#include "chrome/browser/extensions/./extension_prefs_unittest.h"
 #include "chrome/browser/extensions/api/preference/preference_api.h"
-#include "chrome/browser/extensions/extension_prefs.h"
-#include "chrome/browser/extensions/extension_prefs_unittest.h"
 #include "chrome/test/base/testing_profile.h"
 #include "components/user_prefs/pref_registry_syncable.h"
+#include "extensions/browser/extension_prefs.h"
 #include "extensions/common/extension.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using base::Value;
 
 namespace extensions {
 
 namespace {
 
 const char kPref1[] = "path1.subpath";
@@ skipping 432 matching lines @@
       EXPECT_EQ(kDefaultPref1, actual);
     }
   }
 
  private:
   int iteration_;
 };
 TEST_F(ControlledPrefsDisableExtensions, ControlledPrefsDisableExtensions) { }
 
 }  // namespace extensions