[Android] Support startup histogram.

chrome/browser/android/uma_utils.h

Index: chrome/browser/android/uma_utils.h
diff --git a/chrome/browser/android/most_visited_sites.h b/chrome/browser/android/uma_utils.h
similarity index 52%
copy from chrome/browser/android/most_visited_sites.h
copy to chrome/browser/android/uma_utils.h
index 6b1c85db7fcba8c851a336521d1ac02dc4162bd2..085303376d76ee6ecfba6ebb34f73e3a861d039c 100644
--- a/chrome/browser/android/most_visited_sites.h
+++ b/chrome/browser/android/uma_utils.h
@@ -2,17 +2,20 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CHROME_BROWSER_ANDROID_MOST_VISITED_SITES_H_
-#define CHROME_BROWSER_ANDROID_MOST_VISITED_SITES_H_
+#ifndef CHROME_BROWSER_ANDROID_UMA_UTILS_H_
+#define CHROME_BROWSER_ANDROID_UMA_UTILS_H_
 
 #include <jni.h>
 
+#include "base/time/time.h"
+
 namespace chrome {
 namespace android {
 
-bool RegisterMostVisitedSites(JNIEnv* env);
+base::Time GetMainEntryPointTime();
+bool RegisterStartupMetricUtils(JNIEnv* env);
 
 }  // namespace android
 }  // namespace chrome
 
-#endif  // CHROME_BROWSER_ANDROID_MOST_VISITED_SITES_H_
+#endif  // CHROME_BROWSER_ANDROID_UMA_UTILS_H_