Replace Atomic32 with webrtc/base/atomicops.h.

webrtc/call/transport_adapter.h

Index: webrtc/call/transport_adapter.h
diff --git a/webrtc/call/transport_adapter.h b/webrtc/call/transport_adapter.h
index c14c2625cec5634750f1bd2adad0398b7ddf300b..9da9ab760e2b855925d322461fdcead711d39e12 100644
--- a/webrtc/call/transport_adapter.h
+++ b/webrtc/call/transport_adapter.h
@@ -11,7 +11,7 @@
 #define WEBRTC_CALL_TRANSPORT_ADAPTER_H_
 
 #include "webrtc/common_types.h"
-#include "webrtc/system_wrappers/interface/atomic32.h"
+
 #include "webrtc/transport.h"
 
 namespace webrtc {
@@ -29,7 +29,7 @@ class TransportAdapter : public webrtc::Transport {
 
  private:
   newapi::Transport *transport_;
-  Atomic32 enabled_;
+  volatile int enabled_;
 };
 }  // namespace internal
 }  // namespace webrtc