Measure time spent during StrictMode violations.

chrome/android/java/src/org/chromium/chrome/browser/externalauth/ExternalAuthUtils.java

Index: chrome/android/java/src/org/chromium/chrome/browser/externalauth/ExternalAuthUtils.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/externalauth/ExternalAuthUtils.java b/chrome/android/java/src/org/chromium/chrome/browser/externalauth/ExternalAuthUtils.java
index 81feaa909ac1511b3d4dd9f2c1620bd1adea379a..2fe80c1f031f55424db3416df14489aa3c99410c 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/externalauth/ExternalAuthUtils.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/externalauth/ExternalAuthUtils.java
@@ -13,6 +13,7 @@ import android.content.pm.PackageManager;
 import android.content.pm.PackageManager.NameNotFoundException;
 import android.os.Binder;
 import android.os.StrictMode;
+import android.os.SystemClock;
 import android.text.TextUtils;
 
 import com.google.android.gms.common.ConnectionResult;
@@ -25,6 +26,7 @@ import org.chromium.base.VisibleForTesting;
 import org.chromium.base.metrics.RecordHistogram;
 import org.chromium.chrome.browser.ChromeApplication;
 
+import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicReference;
 
 /**
@@ -243,7 +245,12 @@ public class ExternalAuthUtils {
         StrictMode.ThreadPolicy oldPolicy = StrictMode.allowThreadDiskReads();
         StrictMode.allowThreadDiskWrites();
         try {
-            return GoogleApiAvailability.getInstance().isGooglePlayServicesAvailable(context);
+            long time = SystemClock.elapsedRealtime();
+            int isAvailable =
+                    GoogleApiAvailability.getInstance().isGooglePlayServicesAvailable(context);

[Yaron, 2016/01/21 22:03:22]

this one also can happen without native

[Peter Wen, 2016/01/21 22:13:54]

Done.

+            RecordHistogram.recordTimesHistogram("Android.StrictMode.CheckGooglePlayServicesTime",
+                    SystemClock.elapsedRealtime() - time, TimeUnit.MILLISECONDS);
+            return isAvailable;
         } finally {
             StrictMode.setThreadPolicy(oldPolicy);
         }