Replace Atomic32 with webrtc/base/atomicops.h.

webrtc/modules/desktop_capture/shared_desktop_frame.cc

Index: webrtc/modules/desktop_capture/shared_desktop_frame.cc
diff --git a/webrtc/modules/desktop_capture/shared_desktop_frame.cc b/webrtc/modules/desktop_capture/shared_desktop_frame.cc
index 97190e047318f3811a306284ef052737a3c2bea6..10dc7aeedae331cc2f35cfe3ee09df28bbe1038f 100644
--- a/webrtc/modules/desktop_capture/shared_desktop_frame.cc
+++ b/webrtc/modules/desktop_capture/shared_desktop_frame.cc
@@ -10,26 +10,24 @@
 
 #include "webrtc/modules/desktop_capture/shared_desktop_frame.h"
 
+#include "webrtc/base/atomicops.h"
 #include "webrtc/base/scoped_ptr.h"
-#include "webrtc/system_wrappers/interface/atomic32.h"
 
 namespace webrtc {
 
 class SharedDesktopFrame::Core {
  public:
-  Core(DesktopFrame* frame) : frame_(frame) {}
+  Core(DesktopFrame* frame) : ref_count_(0), frame_(frame) {}
 
   DesktopFrame* frame() { return frame_.get(); }
 
-  bool HasOneRef() { return ref_count_.Value() == 1; }
+  bool HasOneRef() { return rtc::AtomicOps::AcquireLoad(&ref_count_) == 1; }
 
-  virtual int32_t AddRef() {
-    return ++ref_count_;
-  }
+  virtual int32_t AddRef() { return rtc::AtomicOps::Increment(&ref_count_); }
 
   virtual int32_t Release() {
     int32_t ref_count;
-    ref_count = --ref_count_;
+    ref_count = rtc::AtomicOps::Decrement(&ref_count_);
     if (ref_count == 0)
       delete this;
     return ref_count;
@@ -38,7 +36,7 @@ class SharedDesktopFrame::Core {
  private:
   virtual ~Core() {}
 
-  Atomic32 ref_count_;
+  volatile int ref_count_;
   rtc::scoped_ptr<DesktopFrame> frame_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(Core);