Refactoring of SessionService to get componentized.

chrome/browser/sessions/base_session_service.h

 // 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_SESSIONS_BASE_SESSION_SERVICE_H_
 #define CHROME_BROWSER_SESSIONS_BASE_SESSION_SERVICE_H_
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/files/file_path.h"
 #include "base/gtest_prod_util.h"
 #include "base/location.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_vector.h"
 #include "base/memory/weak_ptr.h"
 #include "base/task/cancelable_task_tracker.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "components/sessions/session_id.h"
 #include "url/gurl.h"
 
 class BaseSessionServiceDelegate;
 class SessionBackend;
 class SessionCommand;
+class SessionCommands; // TODO(skuhne): Remove this
 
 namespace sessions {
 class SerializedNavigationEntry;
 }
 
 // BaseSessionService is the super class of both tab restore service and
 // session service. It contains commonality needed by both, in particular
 // it manages a set of SessionCommands that are periodically sent to a
 // SessionBackend.
 class BaseSessionService {
@@ skipping 12 matching lines @@
                      const base::FilePath& path,
                      scoped_ptr<BaseSessionServiceDelegate> delegate);
 
   // Deletes the last session.
   void DeleteLastSession();
 
   typedef base::Callback<void(ScopedVector<SessionCommand>)>
       InternalGetCommandsCallback;
 
  protected:
+  friend SessionCommands; // TODO(skuhne): Remove this.
   virtual ~BaseSessionService();
 
   // Returns the backend.
   SessionBackend* backend() const { return backend_.get(); }
 
   // Returns the set of commands that needed to be scheduled. The commands
   // in the vector are owned by BaseSessionService, until they are scheduled
   // on the backend at which point the backend owns the commands.
   std::vector<SessionCommand*>&  pending_commands() {
     return pending_commands_;
@@ skipping 113 matching lines @@
   // A token to make sure that all tasks will be serialized.
   base::SequencedWorkerPool::SequenceToken sequence_token_;
 
   // Used to invoke Save.
   base::WeakPtrFactory<BaseSessionService> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BaseSessionService);
 };
 
 #endif  // CHROME_BROWSER_SESSIONS_BASE_SESSION_SERVICE_H_