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// Copyright 2015 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 EXTENSIONS_BROWSER_DEFERRED_START_RENDER_HOST_H_
#define EXTENSIONS_BROWSER_DEFERRED_START_RENDER_HOST_H_
namespace extensions {
class DeferredStartRenderHostObserver;
// A browser component that tracks a renderer. It allows for its renderer
// startup to be deferred, to throttle resource usage upon profile startup.
// To be used with ExtensionHostQueue.
//
// Note that if BackgroundContents and ExtensionHost are unified
// (crbug.com/77790), this interface will be no longer needed.
class DeferredStartRenderHost {
public:
virtual ~DeferredStartRenderHost() {}
// DeferredStartRenderHost lifetime can be observed.
virtual void AddDeferredStartRenderHostObserver(
DeferredStartRenderHostObserver* observer) = 0;
virtual void RemoveDeferredStartRenderHostObserver(
DeferredStartRenderHostObserver* observer) = 0;
// DO NOT CALL THIS unless you're implementing an ExtensionHostQueue.
// Called by the ExtensionHostQueue to create the RenderView.
virtual void CreateRenderViewNow() = 0;
};
} // namespace extensions
#endif // EXTENSIONS_BROWSER_DEFERRED_START_RENDER_HOST_H_
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