content/shell/renderer/leak_detector.h

   1 // Copyright 2014 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 CONTENT_SHELL_RENDERER_LEAK_DETECTOR_H_
   6 #define CONTENT_SHELL_RENDERER_LEAK_DETECTOR_H_
   7
   8 #include "base/basictypes.h"
   9 #include "content/shell/common/leak_detection_result.h"
  10
  11 namespace blink {
  12 class WebFrame;
  13 }
  14
  15 namespace content {
  16
  17 // LeakDetector counts DOM objects and compare them between two pages.
  18 class LeakDetector {
  19  public:
  20   LeakDetector();
  21
  22   // Counts DOM objects, compare the previous status and returns the result of
  23   // leak detection. It is assumed that this method is always called when a
  24   // specific page, like about:blank is loaded to compare the previous
  25   // circumstance of DOM objects. If the number of objects increses, there
  26   // should be a leak.
  27   LeakDetectionResult TryLeakDetection(blink::WebFrame* frame);
  28
  29  private:
  30   // The number of the live documents last time.
  31   unsigned previous_number_of_live_documents_;
  32
  33   // The number of the live nodes last time.
  34   unsigned previous_number_of_live_nodes_;
  35
  36   DISALLOW_COPY_AND_ASSIGN(LeakDetector);
  37 };
  38
  39 }  // namespace content
  40
  41 #endif  // CONTENT_SHELL_RENDERER_LEAK_DETECTOR_H_