Replace Atomic32 with webrtc/base/atomicops.h.

webrtc/voice_engine/voice_engine_impl.cc

Index: webrtc/voice_engine/voice_engine_impl.cc
diff --git a/webrtc/voice_engine/voice_engine_impl.cc b/webrtc/voice_engine/voice_engine_impl.cc
index f7f363debec0987bfa8423e14dc102a84c11cc47..bc8eca57c5422fd9a2ec96934669037bedd48a79 100644
--- a/webrtc/voice_engine/voice_engine_impl.cc
+++ b/webrtc/voice_engine/voice_engine_impl.cc
@@ -14,7 +14,7 @@
 #include "webrtc/modules/audio_device/android/audio_track_jni.h"
 #include "webrtc/modules/utility/interface/jvm_android.h"
 #endif
-
+#include "webrtc/base/atomicops.h"
 #include "webrtc/modules/audio_coding/main/interface/audio_coding_module.h"
 #include "webrtc/system_wrappers/interface/trace.h"
 #include "webrtc/voice_engine/voice_engine_impl.h"
@@ -54,12 +54,12 @@ VoiceEngine* GetVoiceEngine(const Config* config, bool owns_config) {
 }
 
 int VoiceEngineImpl::AddRef() {
-  return ++_ref_count;
+  return rtc::AtomicOps::Increment(&_ref_count);
 }
 
 // This implements the Release() method for all the inherited interfaces.
 int VoiceEngineImpl::Release() {
-  int new_ref = --_ref_count;
+  int new_ref = rtc::AtomicOps::Decrement(&_ref_count);
   assert(new_ref >= 0);
   if (new_ref == 0) {
     WEBRTC_TRACE(kTraceApiCall, kTraceVoice, -1,