[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 81f402936423b81d476b4374b57b0c7181c80c94..634118a85ea0269ca61f613fd557b77d85c9de5e 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
@@ -32,6 +34,9 @@ int ChromeMainDelegateAndroid::RunProcess(
     JNIEnv* env = base::android::AttachCurrentThread();
     RegisterApplicationNativeMethods(env);
 
+    base::Time startTime = chrome::android::GetMainEntryPointTime();
+    startup_metric_utils::RecordSavedMainEntryPointTime(startTime);
+
     browser_runner_.reset(content::BrowserMainRunner::Create());
     return browser_runner_->Initialize(main_function_params);
   }