extensions/browser/extension_host_queue.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef EXTENSIONS_BROWSER_EXTENSION_HOST_QUEUE_H_
   6 #define EXTENSIONS_BROWSER_EXTENSION_HOST_QUEUE_H_
   7
   8 namespace extensions {
   9
  10 class DeferredStartRenderHost;
  11
  12 // An interface for a queue of ExtensionHosts waiting for initialization.
  13 // This is used to implement different throttling strategies.
  14 class ExtensionHostQueue {
  15  public:
  16   virtual ~ExtensionHostQueue() {}
  17
  18   // Adds a host to the queue for RenderView creation.
  19   virtual void Add(DeferredStartRenderHost* host) = 0;
  20
  21   // Removes a host from the queue (for example, it may be deleted before
  22   // having a chance to start).
  23   virtual void Remove(DeferredStartRenderHost* host) = 0;
  24 };
  25
  26 }  // namespace extensions
  27
  28 #endif  // EXTENSIONS_BROWSER_EXTENSION_HOST_QUEUE_H_