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// Copyright (c) 2011 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/memory/ref_counted.h"
#include "base/time.h"
#include "content/browser/plugin_process_host.h"
class Task;
namespace base {
class MessageLoopProxy;
class WaitableEvent;
}
class PluginDataRemover : public base::RefCountedThreadSafe<PluginDataRemover>,
public PluginProcessHost::Client,
public IPC::Channel::Listener {
public:
PluginDataRemover();
// The plug-in whose data should be removed (usually Flash) is specified via
// its MIME type. This method sets a different MIME type in order to call a
// different plug-in (for example in tests).
void set_mime_type(const std::string& mime_type) { mime_type_ = mime_type; }
// Starts removing plug-in data stored since |begin_time|.
base::WaitableEvent* StartRemoving(base::Time begin_time);
// 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();
// Indicates whether we are still in the process of removing plug-in data.
bool is_removing() const { return is_removing_; }
// Wait until removing has finished. When the browser is still running (i.e.
// not during shutdown), you should use a WaitableEventWatcher in combination
// with the WaitableEvent returned by StartRemoving.
void Wait();
// PluginProcessHost::Client methods.
virtual int ID();
virtual bool OffTheRecord();
virtual void SetPluginInfo(const webkit::npapi::WebPluginInfo& info);
virtual void OnChannelOpened(const IPC::ChannelHandle& handle);
virtual void OnError();
// IPC::Channel::Listener methods.
virtual bool OnMessageReceived(const IPC::Message& message);
virtual void OnChannelError();
private:
friend class base::RefCountedThreadSafe<PluginDataRemover>;
friend class PluginDataRemoverTest;
~PluginDataRemover();
// Signals that we are finished with removing data (successful or not). This
// method is safe to call multiple times.
void SignalDone();
// Connects the client side of a newly opened plug-in channel.
void ConnectToChannel(const IPC::ChannelHandle& handle);
// Handles the PluginHostMsg_ClearSiteDataResult message.
void OnClearSiteDataResult(bool success);
// Called when a timeout happens in order not to block the client
// indefinitely.
void OnTimeout();
std::string mime_type_;
bool is_removing_;
// 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_;
scoped_ptr<base::WaitableEvent> event_;
// We own the channel, but it's used on the IO thread, so it needs to be
// deleted there. It's NULL until we have opened a connection to the plug-in
// process.
IPC::Channel* channel_;
DISALLOW_COPY_AND_ASSIGN(PluginDataRemover);
};
#endif // CHROME_BROWSER_PLUGIN_DATA_REMOVER_H_
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