Separate deferred startup into tasks.

chrome/android/java/src/org/chromium/chrome/browser/metrics/UmaUtils.java

Index: chrome/android/java/src/org/chromium/chrome/browser/metrics/UmaUtils.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/metrics/UmaUtils.java b/chrome/android/java/src/org/chromium/chrome/browser/metrics/UmaUtils.java
index bdbc1283a74d6fb14be65213c52a895e375d34d3..8b66730899972828baf2f76040bff6ddfb49a315 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/metrics/UmaUtils.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/metrics/UmaUtils.java
@@ -18,6 +18,7 @@ public class UmaUtils {
     private static long sApplicationStartUptimeMs;
 
     private static boolean sRunningApplicationStart;
+    private static long sForegroundStartTimeMs;
 
     /**
      * Record the time at which the activity started. This should be called asap after
@@ -32,6 +33,10 @@ public class UmaUtils {
         sApplicationStartUptimeMs = SystemClock.uptimeMillis();
     }
 
+    public static void recordForegroundStartTime() {
+        sForegroundStartTimeMs = SystemClock.uptimeMillis();
+    }
+
     /**
      * Whether the application is in the early stage since the browser process start. The
      * "application start" ends right after the last histogram related to browser startup is
@@ -69,5 +74,10 @@ public class UmaUtils {
         return sApplicationStartUptimeMs;

[Yaron, 2016/07/06 14:27:50]

so remove this now?

[Peter Wen, 2016/07/06 15:21:37]

Done.

     }
 
+    public static long getForegroundStartTime() {
+        assert sForegroundStartTimeMs != 0;
+        return sForegroundStartTimeMs;
+    }
+
     private static native void nativeRecordMetricsReportingDefaultOptIn(boolean optIn);
 }