Measure time spent during StrictMode violations.

chrome/android/javatests/src/org/chromium/chrome/browser/webapps/WebappAuthenticatorTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/webapps/WebappAuthenticatorTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/webapps/WebappAuthenticatorTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/webapps/WebappAuthenticatorTest.java
index f7ee00dc8c2f4056dfbc6cd3e91c911352ea4442..583aa8fde5160b60aa00b672f61b686ed26c8880 100644
--- a/chrome/android/javatests/src/org/chromium/chrome/browser/webapps/WebappAuthenticatorTest.java
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/webapps/WebappAuthenticatorTest.java
@@ -8,9 +8,12 @@ import android.content.Context;
 import android.test.InstrumentationTestCase;
 import android.test.suitebuilder.annotation.SmallTest;
 
+import org.chromium.base.metrics.RecordHistogram;
+
 public class WebappAuthenticatorTest extends InstrumentationTestCase {
     @SmallTest
     public void testAuthentication() {
+        RecordHistogram.disableForTests();

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

Can you update my ExternalNavigationHandlerTest to use this instead of its
custom flag?

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

Mind if I fix both TPS and ExternalNavigation in a follow-up CL?

[Yaron, 2016/01/21 21:05:57]

sure

         Context context = getInstrumentation().getTargetContext();
         String url = "http://www.example.org/hello.html";
         byte[] mac = WebappAuthenticator.getMacForUrl(context, url);