extensions/browser/deferred_start_render_host_observer.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_DEFERRED_START_RENDER_HOST_OBSERVER_H_
   6 #define EXTENSIONS_BROWSER_DEFERRED_START_RENDER_HOST_OBSERVER_H_
   7
   8 namespace extensions {
   9 class DeferredStartRenderHost;
  10
  11 // Observer of DeferredStartRenderHost lifetime.
  12 //
  13 // Note that if BackgroundContents and ExtensionHost are unified
  14 // (crbug.com/77790), this can be replaced by ExtensionHostObserver.
  15 class DeferredStartRenderHostObserver {
  16  public:
  17   virtual ~DeferredStartRenderHostObserver() {}
  18
  19   // Called when a DeferredStartRenderHost started loading.
  20   virtual void OnDeferredStartRenderHostDidStartLoading(
  21       const DeferredStartRenderHost* host) {}
  22
  23   // Called when a DeferredStartRenderHost stopped loading.
  24   virtual void OnDeferredStartRenderHostDidStopLoading(
  25       const DeferredStartRenderHost* host) {}
  26
  27   // Called when a DeferredStartRenderHost is destroyed.
  28   virtual void OnDeferredStartRenderHostDestroyed(
  29       const DeferredStartRenderHost* host) {}
  30 };
  31
  32 }  // namespace extensions
  33
  34 #endif  // EXTENSIONS_BROWSER_DEFERRED_START_RENDER_HOST_OBSERVER_H_