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/trace.h b/webrtc/system_wrappers/interface/trace.h
index 4cbda45..cbb9702 100644
--- a/webrtc/system_wrappers/interface/trace.h
+++ b/webrtc/system_wrappers/interface/trace.h
@@ -48,24 +48,24 @@
   // filter parameter is a bitmask where each message type is enumerated by the
   // TraceLevel enumerator. TODO(hellner): why is the TraceLevel enumerator not
   // defined in this file?
-  static WebRtc_Word32 SetLevelFilter(const WebRtc_UWord32 filter);
+  static int32_t SetLevelFilter(const uint32_t filter);
 
   // Returns what type of messages are written to the trace file.
-  static WebRtc_Word32 LevelFilter(WebRtc_UWord32& filter);
+  static int32_t LevelFilter(uint32_t& filter);
 
   // Sets the file name. If add_file_counter is false the same file will be
   // reused when it fills up. If it's true a new file with incremented name
   // will be used.
-  static WebRtc_Word32 SetTraceFile(const char* file_name,
-                                    const bool add_file_counter = false);
+  static int32_t SetTraceFile(const char* file_name,
+                              const bool add_file_counter = false);
 
   // Returns the name of the file that the trace is currently writing to.
-  static WebRtc_Word32 TraceFile(char file_name[1024]);
+  static int32_t TraceFile(char file_name[1024]);
 
   // Registers callback to receive trace messages.
   // TODO(hellner): Why not use OutStream instead? Why is TraceCallback not
   // defined in this file?
-  static WebRtc_Word32 SetTraceCallback(TraceCallback* callback);
+  static int32_t SetTraceCallback(TraceCallback* callback);
 
   // Adds a trace message for writing to file. The message is put in a queue
   // for writing to file whenever possible for performance reasons. I.e. there
@@ -79,7 +79,7 @@
   // TODO(hellner) Why is TraceModule not defined in this file?
   static void Add(const TraceLevel level,
                   const TraceModule module,
-                  const WebRtc_Word32 id,
+                  const int32_t id,
                   const char* msg, ...);
 };