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// 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 CHROME_BROWSER_PRERENDER_PRERENDER_PENDING_SWAP_THROTTLE_H_
#define CHROME_BROWSER_PRERENDER_PRERENDER_PENDING_SWAP_THROTTLE_H_
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/memory/weak_ptr.h"
#include "content/public/browser/resource_throttle.h"
namespace net {
class URLRequest;
}
namespace prerender {
class PrerenderTracker;
// This class implements policy on main frame navigations for prerenders
// which we would like to swap, but are pending session storage namespace
// merges. If the merge failed, we will release the throttle. If the merge
// succeeded, we will swap the prerender, making the underlying request
// obsolete.
class PrerenderPendingSwapThrottle
: public content::ResourceThrottle,
public base::SupportsWeakPtr<PrerenderPendingSwapThrottle> {
public:
PrerenderPendingSwapThrottle(net::URLRequest* request,
PrerenderTracker* tracker);
// content::ResourceThrottle implementation:
void WillStartRequest(bool* defer) override;
const char* GetNameForLogging() const override;
// Called by the PrerenderTracker when the swap failed.
// May only be called if currently throttling the resource.
void Resume();
// Called by the PrerenderTracker when the swap succeeded.
// May only be called if currently throttling the resource.
void Cancel();
private:
net::URLRequest* request_;
PrerenderTracker* tracker_;
bool throttled_;
DISALLOW_COPY_AND_ASSIGN(PrerenderPendingSwapThrottle);
};
} // namespace prerender
#endif // CHROME_BROWSER_PRERENDER_PRERENDER_PENDING_SWAP_THROTTLE_H_
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