Enabled MOZ_PERF_METRICS in the Mac build:

build/mac/NGLayoutBuildList.pm

@@ -839,6 +839,7 @@ sub BuildIDLProjects()
 	}
 
 	BuildIDLProject(":mozilla:modules:libpref:macbuild:libprefIDL.mcp",				"libpref");
+	BuildIDLProject(":mozilla:modules:libutil:macbuild:libutilIDL.mcp",				"libutil");
 	BuildIDLProject(":mozilla:modules:libjar:macbuild:libjarIDL.mcp",				"libjar");
 	BuildIDLProject(":mozilla:modules:oji:macbuild:ojiIDL.mcp",						"oji");
 	BuildIDLProject(":mozilla:js:macbuild:XPConnectIDL.mcp", 						"xpconnect");

config/mac/DefinesMozilla.h

@@ -90,4 +90,7 @@
 
 #define DETECT_WEBSHELL_LEAKS 1
 
+//#define MOZ_PERF_METRICS 1		// Uncomment to get metrics in layout, parser and webshell.
+															// You also need to define __TIMESIZE_DOUBLE__ in <timesize.mac.h>
+
 #endif /* DefinesMozilla_h_ */

modules/libutil/macbuild/libutil.exp

@@ -8,3 +8,15 @@ XP_NotifyObservers
 XP_DisableObserverNotification
 XP_EnableObserverNotification
 XP_IsObserverNotificationEnabled
+Print__9StopwatchFv
+GetCPUTime__9StopwatchFv
+GetRealTime__9StopwatchFv
+CpuTime__9StopwatchFv
+RealTime__9StopwatchFv
+Continue__9StopwatchFv
+RestoreState__9StopwatchFv
+SaveState__9StopwatchFv
+Stop__9StopwatchFv
+Start__9StopwatchFi
+__dt__9StopwatchFv
+__ct__9StopwatchFv

modules/libutil/src/stopwatch.cpp

@@ -130,7 +130,8 @@ double Stopwatch::CpuTime() {
 
 double Stopwatch::GetRealTime(){ 
 #if defined(R__MAC)
-   return(double)clock() / gTicks;
+// return(double)clock() / gTicks;
+   return(double)clock() / 1000000L;
 #elif defined(R__UNIX)
    struct tms cpt;
    return (double)times(&cpt) / gTicks;
@@ -150,7 +151,8 @@ double Stopwatch::GetRealTime(){
 
 double Stopwatch::GetCPUTime(){ 
 #if defined(R__MAC)
-   return(double)clock() / gTicks;
+// return(double)clock() / gTicks;
+   return(double)clock();
 #elif defined(R__UNIX)
    struct tms cpt;
    times(&cpt);