third_party/WebKit/public/platform/WebFrameScheduler.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 WebFrameScheduler_h
   6 #define WebFrameScheduler_h
   7
   8 #include "WebCommon.h"
   9
  10 #include <string>
  11
  12 namespace blink {
  13
  14 class WebSecurityOrigin;
  15 class WebTaskRunner;
  16
  17 class BLINK_PLATFORM_EXPORT WebFrameScheduler {
  18 public:
  19     virtual ~WebFrameScheduler() { }
  20
  21     // The scheduler may throttle tasks associated with offscreen frames.
  22     virtual void setFrameVisible(bool) { }
  23
  24     // Returns the WebTaskRunner for loading tasks.
  25     // WebFrameScheduler owns the returned WebTaskRunner.
  26     virtual WebTaskRunner* loadingTaskRunner() { return nullptr; }
  27
  28     // Returns the WebTaskRunner for timer tasks.
  29     // WebFrameScheduler owns the returned WebTaskRunner.
  30     virtual WebTaskRunner* timerTaskRunner() { return nullptr; }
  31
  32     // Record the current origin. This is for task attribution in tracing.
  33     virtual void setFrameOrigin(const WebSecurityOrigin*) { }
  34 };
  35
  36 } // namespace blink
  37
  38 #endif // WebFrameScheduler_h