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diff --git a/webrtc/modules/desktop_capture/mac/full_screen_chrome_window_detector.h b/webrtc/modules/desktop_capture/mac/full_screen_chrome_window_detector.h
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+++ b/webrtc/modules/desktop_capture/mac/full_screen_chrome_window_detector.h
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+/*
+ *  Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_MODULES_DESKTOP_CAPTURE_MAC_FULL_SCREEN_CHROME_WINDOW_DETECTOR_H_
+#define WEBRTC_MODULES_DESKTOP_CAPTURE_MAC_FULL_SCREEN_CHROME_WINDOW_DETECTOR_H_
+
+#include <ApplicationServices/ApplicationServices.h>
+
+#include "webrtc/modules/desktop_capture/window_capturer.h"
+#include "webrtc/system_wrappers/include/atomic32.h"
+#include "webrtc/system_wrappers/include/tick_util.h"
+
+namespace webrtc {
+
+// This is a work around for the Chrome tab full-screen behavior: Chrome
+// creates a new window in full-screen mode to show a tab full-screen and
+// minimizes the old window. To continue capturing in this case, we try to
+// find the new full-screen window using these criteria:
+// 0. The original shared window is minimized.
+// 1. The original shared window's owner application name is "Google Chrome".
+// 2. The original window and the new window have the same title and owner
+// pid.
+// 3. The new window is full-screen.
+// 4. The new window didn't exist at least 500 millisecond ago.
+
+class FullScreenChromeWindowDetector {
+ public:
+  FullScreenChromeWindowDetector();
+
+  void AddRef() { ++ref_count_; }
+  void Release() {
+    if (--ref_count_ == 0)
+      delete this;
+  }
+
+  // Returns the full-screen window in place of the original window if all the
+  // criteria are met, or kCGNullWindowID if no such window found.
+  CGWindowID FindFullScreenWindow(CGWindowID original_window);
+
+  // The caller should call this function periodically, no less than twice per
+  // second.
+  void UpdateWindowListIfNeeded(CGWindowID original_window);
+
+ private:
+  ~FullScreenChromeWindowDetector();
+
+  Atomic32 ref_count_;
+
+  // We cache the last two results of the window list, so
+  // |previous_window_list_| is taken at least 500ms before the next Capture()
+  // call. If we only save the last result, we may get false positive (i.e.
+  // full-screen window exists in the list) if Capture() is called too soon.
+  WindowCapturer::WindowList current_window_list_;
+  WindowCapturer::WindowList previous_window_list_;
+  TickTime last_udpate_time_;
+
+  RTC_DISALLOW_COPY_AND_ASSIGN(FullScreenChromeWindowDetector);
+};
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_MODULES_DESKTOP_CAPTURE_MAC_FULL_SCREEN_CHROME_WINDOW_DETECTOR_H_