WebRtc_Word32 -> int32_t in utility/

BUG=314

Review URL: https://webrtc-codereview.appspot.com/1307005

git-svn-id: http://webrtc.googlecode.com/svn/trunk@3797 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/modules/utility/source/process_thread_impl.h b/webrtc/modules/utility/source/process_thread_impl.h
index 79b1272..7edb565 100644
--- a/webrtc/modules/utility/source/process_thread_impl.h
+++ b/webrtc/modules/utility/source/process_thread_impl.h
@@ -25,11 +25,11 @@
     ProcessThreadImpl();
     virtual ~ProcessThreadImpl();
 
-    virtual WebRtc_Word32 Start();
-    virtual WebRtc_Word32 Stop();
+    virtual int32_t Start();
+    virtual int32_t Stop();
 
-    virtual WebRtc_Word32 RegisterModule(const Module* module);
-    virtual WebRtc_Word32 DeRegisterModule(const Module* module);
+    virtual int32_t RegisterModule(const Module* module);
+    virtual int32_t DeRegisterModule(const Module* module);
 
 protected:
     static bool Run(void* obj);