Refactored SettingsFrontend and forwarding of calls to the backends.

chrome/browser/extensions/settings/sync_or_local_value_store_cache.h

Index: chrome/browser/extensions/settings/sync_or_local_value_store_cache.h
diff --git a/chrome/browser/extensions/settings/sync_or_local_value_store_cache.h b/chrome/browser/extensions/settings/sync_or_local_value_store_cache.h
new file mode 100644
index 0000000000000000000000000000000000000000..667a083a43c5fcf314b0927b53521af95824b849
--- /dev/null
+++ b/chrome/browser/extensions/settings/sync_or_local_value_store_cache.h
@@ -0,0 +1,64 @@
+// 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_SETTINGS_SYNC_OR_LOCAL_VALUE_STORE_CACHE_H_
+#define CHROME_BROWSER_EXTENSIONS_SETTINGS_SYNC_OR_LOCAL_VALUE_STORE_CACHE_H_
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "chrome/browser/extensions/settings/settings_observer.h"
+#include "chrome/browser/extensions/settings/settings_storage_quota_enforcer.h"
+#include "chrome/browser/extensions/settings/value_store_cache.h"
+
+class FilePath;
+
+namespace extensions {
+
+class SettingsBackend;
+class SettingsStorageFactory;
+
+// ValueStoreCache for the LOCAL and SYNC namespaces. It owns a backend for
+// apps and another for extensions. Each backend takes care of persistence and
+// syncing.
+class SyncOrLocalValueStoreCache : public ValueStoreCache {
+ public:
+  SyncOrLocalValueStoreCache(
+      settings_namespace::Namespace settings_namespace,
+      const scoped_refptr<SettingsStorageFactory>& factory,
+      const SettingsStorageQuotaEnforcer::Limits& quota,
+      const scoped_refptr<SettingsObserverList>& observers,
+      const FilePath& profile_path);
+  virtual ~SyncOrLocalValueStoreCache();
+
+  SettingsBackend* GetAppBackend() const;
+  SettingsBackend* GetExtensionBackend() const;
+
+  // ValueStoreCache implementation:
+
+  virtual scoped_refptr<base::MessageLoopProxy> GetMessageLoop() const OVERRIDE;
+
+  virtual void RunWithValueStoreForExtension(
+      const StorageCallback& callback,
+      scoped_refptr<const Extension> extension) OVERRIDE;
+
+  virtual void DeleteStorageSoon(const std::string& extension_id) OVERRIDE;
+
+ private:
+  void InitOnFileThread(const scoped_refptr<SettingsStorageFactory>& factory,
+                        const SettingsStorageQuotaEnforcer::Limits& quota,
+                        const scoped_refptr<SettingsObserverList>& observers,
+                        const FilePath& profile_path);
+
+  settings_namespace::Namespace settings_namespace_;
+  scoped_ptr<SettingsBackend> app_backend_;
+  scoped_ptr<SettingsBackend> extension_backend_;
+
+  DISALLOW_COPY_AND_ASSIGN(SyncOrLocalValueStoreCache);
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_SETTINGS_SYNC_OR_LOCAL_VALUE_STORE_CACHE_H_