Clean up PluginDataRemover.

chrome/browser/plugin_data_remover.h

 // Copyright (c) 2010 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_PLUGIN_DATA_REMOVER_H_
 #define CHROME_BROWSER_PLUGIN_DATA_REMOVER_H_
 #pragma once
 
 #include "base/ref_counted.h"
 #include "base/time.h"
 #include "chrome/browser/plugin_process_host.h"
-#include "ipc/ipc_channel_proxy.h"
-#include "ipc/ipc_message.h"
+#include "ipc/ipc_channel.h"
 
 class Task;
 
 namespace base {
 class MessageLoopProxy;
 }
 
-class PluginDataRemover : public PluginProcessHost::Client,
+class PluginDataRemover : public base::RefCountedThreadSafe<PluginDataRemover>,
+                          public PluginProcessHost::Client,
                           public IPC::Channel::Listener {
  public:
   PluginDataRemover();
-  ~PluginDataRemover();
 
-  // Starts removing plug-in data stored since |begin_time| and calls
-  // |done_task| on the current thread when finished.
+  // Starts removing plug-in data stored since |begin_time|. If |done_task| is
+  // not NULL, it is run on the current thread when removing has finished.
   void StartRemoving(base::Time begin_time, Task* done_task);
 
+  // Returns whether there is a plug-in installed that supports removing
+  // LSO data. Because this method possibly has to load the plug-in list, it
+  // should only be called on the FILE thread.
+  static bool IsSupported();
+
+  bool is_removing() const { return is_removing_; }
+
+  // Sets the task to run when removing has finished. Takes ownership of
+  // the passed task.
+  void set_done_task(Task* task) { done_task_.reset(task); }
+
   // PluginProcessHost::Client methods
   virtual int ID();
   virtual bool OffTheRecord();
   virtual void SetPluginInfo(const WebPluginInfo& info);
   virtual void OnChannelOpened(const IPC::ChannelHandle& handle);
   virtual void OnError();
 
   // IPC::ChannelProxy::MessageFilter methods
   virtual void OnMessageReceived(const IPC::Message& message);
   virtual void OnChannelError();
 
  private:
+  friend class base::RefCountedThreadSafe<PluginDataRemover>;
+  ~PluginDataRemover();
+
   void SignalDone();
-  void SignalError();
+  void ConnectToChannel(const IPC::ChannelHandle& handle);
   void OnClearSiteDataResult(bool success);
   void OnTimeout();
 
   scoped_refptr<base::MessageLoopProxy> message_loop_;
+  bool is_removing_;
   scoped_ptr<Task> done_task_;
+  // The point in time when we start removing data.
+  base::Time remove_start_time_;
+  // The point in time from which on we remove data.
   base::Time begin_time_;
   // We own the channel, but it's used on the IO thread, so it needs to be
   // deleted there as well.
   IPC::Channel* channel_;
-  ScopedRunnableMethodFactory<PluginDataRemover> method_factory_;
 };
 
 #endif  // CHROME_BROWSER_PLUGIN_DATA_REMOVER_H_