Replace Atomic32 with webrtc/base/atomicops.h.

webrtc/modules/desktop_capture/mac/full_screen_chrome_window_detector.h

 /*
  *  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/base/atomicops.h"
 #include "webrtc/modules/desktop_capture/window_capturer.h"
-#include "webrtc/system_wrappers/interface/atomic32.h"
 #include "webrtc/system_wrappers/interface/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 AddRef() { rtc::AtomicOps::Increment(&ref_count_); }
   void Release() {
-    if (--ref_count_ == 0)
+    if (rtc::AtomicOps::Decrement(&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_;
+  volatile int 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_