[Android] Support startup histogram.

chrome/app/android/chrome_main_delegate_android.cc

Index: chrome/app/android/chrome_main_delegate_android.cc
diff --git a/chrome/app/android/chrome_main_delegate_android.cc b/chrome/app/android/chrome_main_delegate_android.cc
index 6b726c6147f63599fa024b026a7a59b86540dd56..c53fe41435368f343288bece74bc205c56e1dce2 100644
--- a/chrome/app/android/chrome_main_delegate_android.cc
+++ b/chrome/app/android/chrome_main_delegate_android.cc
@@ -8,6 +8,8 @@
 #include "base/debug/trace_event.h"
 #include "chrome/browser/android/chrome_jni_registrar.h"
 #include "chrome/browser/android/chrome_startup_flags.h"
+#include "chrome/common/android/startup_metric_utils_android.h"
+#include "chrome/common/startup_metric_utils.h"
 #include "content/public/browser/browser_main_runner.h"
 
 // ChromeMainDelegateAndroid is created when the library is loaded. It is always
@@ -36,7 +38,11 @@ int ChromeMainDelegateAndroid::RunProcess(
     // of UI thread tasks a second request to start it can come in while the

[jeremy, 2013/08/28 18:15:56]

nit: of of

[aberent, 2013/08/29 11:45:13]

Done.

     // first request is still being processed. We must keep the same

[jeremy, 2013/08/28 18:15:56]

nit: Some people have strong feelings about using the term 'we' in comments,
just FYI, I really don't mind either way :)

[aberent, 2013/08/29 11:45:13]

Done.

     // browser runner for the second request.
+    // Also only record the start time first time round, since this is the start

[jeremy, 2013/08/28 18:15:56]

nit: time -> time the

[aberent, 2013/08/29 11:45:13]

Done.

+    // time of the application, and will be same for all requests.
     if (!browser_runner_.get()) {
+      base::Time startTime = chrome::android::GetMainEntryPointTime();
+      startup_metric_utils::RecordSavedMainEntryPointTime(startTime);
       browser_runner_.reset(content::BrowserMainRunner::Create());
     }
     return browser_runner_->Initialize(main_function_params);