components: Remove use of MessageLoopProxy and deprecated MessageLoop APIs

components/webdata/common/web_database_backend.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.
 
 #ifndef COMPONENTS_WEBDATA_COMMON_WEB_DATABASE_BACKEND_H_
 #define COMPONENTS_WEBDATA_COMMON_WEB_DATABASE_BACKEND_H_
 
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/ref_counted_delete_on_message_loop.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
+#include "base/single_thread_task_runner.h"
 #include "components/webdata/common/web_database_service.h"
 #include "components/webdata/common/webdata_export.h"
 
 class WebDatabase;
 class WebDatabaseTable;
 class WebDataRequest;
 class WebDataRequestManager;
 
 namespace tracked_objects {
 class Location;
 }
 
 // WebDatabaseBackend handles all database tasks posted by
 // WebDatabaseService. It is refcounted to allow asynchronous destruction on the
 // DB thread.
 
 class WEBDATA_EXPORT WebDatabaseBackend
     : public base::RefCountedDeleteOnMessageLoop<WebDatabaseBackend> {
  public:
   class Delegate {
    public:
     virtual ~Delegate() {}
 
     // Invoked when the backend has finished loading the db.
     virtual void DBLoaded(sql::InitStatus status) = 0;
   };
 
-  WebDatabaseBackend(const base::FilePath& path,
-                     Delegate* delegate,
-                     const scoped_refptr<base::MessageLoopProxy>& db_thread);
+  WebDatabaseBackend(
+      const base::FilePath& path,
+      Delegate* delegate,
+      const scoped_refptr<base::SingleThreadTaskRunner>& db_thread);
 
   // Must call only before InitDatabaseWithCallback.
   void AddTable(scoped_ptr<WebDatabaseTable> table);
 
   // Initializes the database and notifies caller via callback when complete.
   // Callback is called synchronously.
   void InitDatabase();
 
   // Opens the database file from the profile path if an init has not yet been
   // attempted. Separated from the constructor to ease construction/destruction
@@ skipping 60 matching lines @@
   // fails), used to avoid continually trying to reinit if the db init fails.
   bool init_complete_;
 
   // Delegate. See the class definition above for more information.
   scoped_ptr<Delegate> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(WebDatabaseBackend);
 };
 
 #endif  // COMPONENTS_WEBDATA_COMMON_WEB_DATABASE_BACKEND_H_