WebRtc_Word32 -> int32_t in system_wrappers

BUG=314

Review URL: https://webrtc-codereview.appspot.com/1301004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@3791 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/system_wrappers/interface/cpu_info.h b/webrtc/system_wrappers/interface/cpu_info.h
index e3c9c29..cf1025f 100644
--- a/webrtc/system_wrappers/interface/cpu_info.h
+++ b/webrtc/system_wrappers/interface/cpu_info.h
@@ -17,11 +17,11 @@
 
 class CpuInfo {
  public:
-  static WebRtc_UWord32 DetectNumberOfCores();
+  static uint32_t DetectNumberOfCores();
 
  private:
   CpuInfo() {}
-  static WebRtc_UWord32 number_of_cores_;
+  static uint32_t number_of_cores_;
 };
 
 } // namespace webrtc