Consolidate RecordBrowserStartupTime() into one location

chrome/browser/chrome_browser_main_mac.mm

Index: chrome/browser/chrome_browser_main_mac.mm
diff --git a/chrome/browser/chrome_browser_main_mac.mm b/chrome/browser/chrome_browser_main_mac.mm
index 71edcc645337a95a925a9c82d4829f7904b209fe..b7a685ff479cfbc00754b19ed38dc81807418b35 100644
--- a/chrome/browser/chrome_browser_main_mac.mm
+++ b/chrome/browser/chrome_browser_main_mac.mm
@@ -5,8 +5,6 @@
 #include "chrome/browser/chrome_browser_main_mac.h"
 
 #import <Cocoa/Cocoa.h>
-#include <sys/sysctl.h>
-#include <sys/time.h>
 
 #include "base/command_line.h"
 #include "base/debug/debugger.h"
@@ -14,7 +12,6 @@
 #include "base/mac/bundle_locations.h"
 #include "base/mac/mac_util.h"
 #include "base/memory/scoped_nsobject.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
 #include "chrome/app/breakpad_mac.h"
 #import "chrome/browser/app_controller_mac.h"
@@ -58,23 +55,6 @@ void RecordBreakpadStatusUMA(MetricsService* metrics) {
   metrics->RecordBreakpadHasDebugger(base::debug::BeingDebugged());
 }
 
-void RecordBrowserStartupTime() {
-  int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, getpid() };
-  size_t len = 0;
-  if (sysctl(mib, arraysize(mib), NULL, &len, NULL, 0) < 0)
-    return;
-
-  scoped_ptr_malloc<struct kinfo_proc>
-      proc(static_cast<struct kinfo_proc*>(malloc(len)));
-  if (sysctl(mib, arraysize(mib), proc.get(), &len, NULL, 0) < 0)
-    return;
-  base::Time process_creation_time =
-      base::Time::FromTimeVal(proc->kp_proc.p_un.__p_starttime);
-
-  RecordPreReadExperimentTime("Startup.BrowserMessageLoopStartTime",
-      base::Time::Now() - process_creation_time);
-}
-
 void WarnAboutMinimumSystemRequirements() {
   // Nothing to check for on Mac right now.
 }