Remove dependency of WebData on content

components/webdata/common/web_database_service.h

 // 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.
 
 // Chromium settings and storage represent user-selected preferences and
 // information and MUST not be extracted, overwritten or modified except
 // through Chromium defined APIs.
 
 #ifndef COMPONENTS_WEBDATA_COMMON_WEB_DATABASE_SERVICE_H_
 #define COMPONENTS_WEBDATA_COMMON_WEB_DATABASE_SERVICE_H_
@@ skipping 35 matching lines @@
 //
 ////////////////////////////////////////////////////////////////////////////////
 
 class WEBDATA_EXPORT WebDatabaseService
     : public base::RefCountedDeleteOnMessageLoop<WebDatabaseService> {
  public:
   typedef base::Callback<scoped_ptr<WDTypedResult>(WebDatabase*)> ReadTask;
   typedef base::Callback<WebDatabase::State(WebDatabase*)> WriteTask;
 
   // Takes the path to the WebDatabase file.
+  // WebDatabaseService lives on |ui_thread| and posts tasks to |db_thread|.
   WebDatabaseService(const base::FilePath& path,
-                     const scoped_refptr<base::MessageLoopProxy>& ui_thread);
+                     const scoped_refptr<base::MessageLoopProxy>& ui_thread,
+                     const scoped_refptr<base::MessageLoopProxy>& db_thread);
 
   // Adds |table| as a WebDatabaseTable that will participate in
   // managing the database, transferring ownership. All calls to this
   // method must be made before |LoadDatabase| is called.
   virtual void AddTable(scoped_ptr<WebDatabaseTable> table);
 
   // Initializes the web database service.
   virtual void LoadDatabase();
 
   // Unloads the database without actually shutting down the service.  This can
@@ skipping 70 matching lines @@
   typedef std::vector<DBLoadErrorCallback> ErrorCallbacks;
 
   // Callbacks to be called once the DB has loaded.
   LoadedCallbacks loaded_callbacks_;
 
   // Callbacks to be called if the DB has failed to load.
   ErrorCallbacks error_callbacks_;
 
   // True if the WebDatabase has loaded.
   bool db_loaded_;
+
+  scoped_refptr<base::MessageLoopProxy> db_thread_;
 };
 
 #endif  // COMPONENTS_WEBDATA_COMMON_WEB_DATABASE_SERVICE_H_