Add ExtensionsApiClient interface, use it in the storage API SettingsFrontend

chrome/browser/extensions/api/storage/policy_value_store.cc

 // 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.
 
 #include "chrome/browser/extensions/api/storage/policy_value_store.h"
 
 #include "base/logging.h"
 #include "base/values.h"
-#include "chrome/browser/extensions/api/storage/settings_namespace.h"
 #include "components/policy/core/common/policy_map.h"
 #include "components/policy/core/common/policy_types.h"
 #include "content/public/browser/browser_thread.h"
+#include "extensions/browser/api/storage/settings_namespace.h"
 #include "extensions/browser/value_store/value_store_change.h"
 #include "extensions/browser/value_store/value_store_util.h"
 
 using content::BrowserThread;
 
 namespace util = value_store_util;
 
 namespace extensions {
 
 namespace {
@@ skipping 149 matching lines @@
   return MakeWriteResult(ReadOnlyError(util::NoKey()));
 }
 
 bool PolicyValueStore::Restore() { return delegate_->Restore(); }
 
 bool PolicyValueStore::RestoreKey(const std::string& key) {
   return delegate_->RestoreKey(key);
 }
 
 }  // namespace extensions