Merge 317853 - Make BackgroundContentsService start up BackgroundContents with a delay, as for Exte…

extensions/browser/serial_extension_host_queue.h

 // 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_SERIAL_EXTENSION_HOST_QUEUE_H_
 #define EXTENSIONS_BROWSER_SERIAL_EXTENSION_HOST_QUEUE_H_
 
 #include <list>
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "extensions/browser/extension_host_queue.h"
 
 namespace extensions {
 
-class ExtensionHost;
+class DeferredStartRenderHost;
 
-// An ExtensionHostQueue which initializes ExtensionHosts in the order they're
-// Add()ed, with simple rate limiting logic that re-posts each task to the UI
-// thread, to avoid clogging it for a long period of time.
+// An ExtensionHostQueue which initializes DeferredStartRenderHosts in the order
+// they're Add()ed, with simple rate limiting logic that re-posts each task to
+// the UI thread, to avoid clogging it for a long period of time.
 class SerialExtensionHostQueue : public ExtensionHostQueue {
  public:
   SerialExtensionHostQueue();
   ~SerialExtensionHostQueue() override;
 
  private:
   // ExtensionHostQueue:
-  void Add(ExtensionHost* host) override;
-  void Remove(ExtensionHost* host) override;
+  void Add(DeferredStartRenderHost* host) override;
+  void Remove(DeferredStartRenderHost* host) override;
 
-  // Queues up a delayed task to process the next ExtensionHost in the queue.
+  // Queues up a delayed task to process the next DeferredStartRenderHost in
+  // the queue.
   void PostTask();
 
   // Creates the RenderView for the next host in the queue.
   void ProcessOneHost();
 
   // True if this queue is currently in the process of starting an
-  // ExtensionHost.
+  // DeferredStartRenderHost.
   bool pending_create_;
 
-  // The list of ExtensionHosts waiting to be started.
-  std::list<ExtensionHost*> queue_;
+  // The list of DeferredStartRenderHosts waiting to be started.
+  std::list<DeferredStartRenderHost*> queue_;
 
   base::WeakPtrFactory<SerialExtensionHostQueue> ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SerialExtensionHostQueue);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_SERIAL_EXTENSION_HOST_QUEUE_H_