Measure time spent during StrictMode violations.

base/android/java/src/org/chromium/base/SecureRandomInitializer.java

Index: base/android/java/src/org/chromium/base/SecureRandomInitializer.java
diff --git a/base/android/java/src/org/chromium/base/SecureRandomInitializer.java b/base/android/java/src/org/chromium/base/SecureRandomInitializer.java
index 457e2ef8b913606fc71f3209a7e6ea6e0c95e405..1d83876de5bf2b5700a64b5e03bd5b08dce9cfb2 100644
--- a/base/android/java/src/org/chromium/base/SecureRandomInitializer.java
+++ b/base/android/java/src/org/chromium/base/SecureRandomInitializer.java
@@ -4,9 +4,14 @@
 
 package org.chromium.base;
 
+import android.os.SystemClock;
+
+import org.chromium.base.metrics.RecordHistogram;
+
 import java.io.FileInputStream;
 import java.io.IOException;
 import java.security.SecureRandom;
+import java.util.concurrent.TimeUnit;
 
 /**
  * This class contains code to initialize a SecureRandom generator securely on Android platforms
@@ -22,6 +27,7 @@ public class SecureRandomInitializer {
      * Safely initializes the random number generator, by seeding it with data from /dev/urandom.
      */
     public static void initialize(SecureRandom generator) throws IOException {
+        long time = SystemClock.elapsedRealtime();

[Yaron, 2016/01/21 20:48:15]

I think Ted already fixed this crbug/556599

[Peter Wen, 2016/01/21 20:59:45]

Acknowledged.

         FileInputStream fis = null;
         try {
             fis = new FileInputStream("/dev/urandom");
@@ -38,5 +44,7 @@ public class SecureRandomInitializer {
                 // Ignore exception closing the device.
             }
         }
+        RecordHistogram.recordTimesHistogram("Android.StrictMode.SecureRandomInitialize",
+                SystemClock.elapsedRealtime() - time, TimeUnit.MILLISECONDS);
     }
 }