customtabs: Enable first contentful reporting.

chrome/android/javatests/src/org/chromium/chrome/browser/customtabs/CustomTabActivityTest.java

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser.customtabs;
 
 import static org.chromium.base.test.util.Restriction.RESTRICTION_TYPE_NON_LOW_END_DEVICE;
 
 import android.app.Activity;
 import android.app.Application;
@@ skipping 809 matching lines @@
         assertFalse(navigationEvents.contains(CustomTabsCallback.NAVIGATION_FAILED));
         assertFalse(navigationEvents.contains(CustomTabsCallback.NAVIGATION_ABORTED));
     }
 
     /**
      * Tests that Time To First Contentful Paint is sent.
      */
     @SmallTest
     @RetryOnFailure
     public void testPageLoadMetricIsSent() {
-        Context context = getInstrumentation().getTargetContext().getApplicationContext();
-        CustomTabsConnection connection = CustomTabsConnection.getInstance((Application) context);
-        connection.enablePageLoadMetricsCallbacks();
-
         final AtomicReference<Long> firstContentfulPaintMs = new AtomicReference<>(-1L);
         CustomTabsCallback cb = new CustomTabsCallback() {
             @Override
             public void extraCallback(String callbackName, Bundle args) {
                 assertEquals(CustomTabsConnection.PAGE_LOAD_METRICS_CALLBACK, callbackName);
                 long value = args.getLong(PageLoadMetrics.FIRST_CONTENTFUL_PAINT, -1);
                 assertTrue(value > 0);
                 firstContentfulPaintMs.set(value);
             }
         };
@@ skipping 710 matching lines @@
                 if (jsonText.equalsIgnoreCase("null")) jsonText = "";
                 value = jsonText;
             } catch (InterruptedException | TimeoutException e) {
                 e.printStackTrace();
                 return false;
             }
             return TextUtils.equals(mExpected, value);
         }
     }
 }