mac: Add a profiler for startup time.

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 1cf2fdb86732eea62879f6416821069c1398b10f..98422a94d64ed5cea4bc1441df00d26f4312f467 100644
--- a/chrome/browser/chrome_browser_main_mac.mm
+++ b/chrome/browser/chrome_browser_main_mac.mm
@@ -20,6 +20,7 @@
 #import "chrome/browser/chrome_browser_application_mac.h"
 #include "chrome/browser/mac/install_from_dmg.h"
 #import "chrome/browser/mac/keystone_glue.h"
+#include "chrome/browser/mac/mac_startup_profiler.h"
 #include "chrome/browser/ui/app_list/app_list_service.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
@@ -155,6 +156,7 @@ void RecordCatSixtyFour() {
 ChromeBrowserMainPartsMac::ChromeBrowserMainPartsMac(
     const content::MainFunctionParams& parameters)
     : ChromeBrowserMainPartsPosix(parameters) {
+  MacStartupProfiler::GetInstance()->RecordLaunchTime();

[jeremy, 2014/07/16 08:19:23]

Is this recording something different  than
startup_metric_utils::RecordMainEntryPointTime() ?

[erikchen, 2014/07/16 22:00:33]

No. They are functionally equivalent, with the difference that this reduces the
number of files that touch mac_startup_profiler.

 }
 
 ChromeBrowserMainPartsMac::~ChromeBrowserMainPartsMac() {
@@ -175,6 +177,8 @@ void ChromeBrowserMainPartsMac::PreEarlyInitialization() {
 }
 
 void ChromeBrowserMainPartsMac::PreMainMessageLoopStart() {
+  MacStartupProfiler::GetInstance()->Profile(
+      MacStartupProfiler::PRE_MAIN_MESSAGE_LOOP_START);
   ChromeBrowserMainPartsPosix::PreMainMessageLoopStart();
 
   // Tell Cocoa to finish its initialization, which we want to do manually
@@ -257,7 +261,14 @@ void ChromeBrowserMainPartsMac::PreMainMessageLoopStart() {
   }];
 }
 
+void ChromeBrowserMainPartsMac::PostMainMessageLoopStart() {
+  MacStartupProfiler::GetInstance()->Profile(
+      MacStartupProfiler::POST_MAIN_MESSAGE_LOOP_START);
+}
+
 void ChromeBrowserMainPartsMac::PreProfileInit() {
+  MacStartupProfiler::GetInstance()->Profile(
+      MacStartupProfiler::PRE_PROFILE_INIT);
   ChromeBrowserMainPartsPosix::PreProfileInit();
   // This is called here so that the app shim socket is only created after
   // taking the singleton lock.
@@ -266,6 +277,8 @@ void ChromeBrowserMainPartsMac::PreProfileInit() {
 }
 
 void ChromeBrowserMainPartsMac::PostProfileInit() {
+  MacStartupProfiler::GetInstance()->Profile(
+      MacStartupProfiler::POST_PROFILE_INIT);
   ChromeBrowserMainPartsPosix::PostProfileInit();
   g_browser_process->metrics_service()->RecordBreakpadRegistration(
       breakpad::IsCrashReporterEnabled());