Add HttpUrlConnection backed implementation of CronetEngine.

components/cronet/android/test/javatests/src/org/chromium/net/GetStatusTest.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.net;
 
 import android.os.ConditionVariable;
 import android.test.suitebuilder.annotation.SmallTest;
 
 import org.chromium.base.test.util.Feature;
@@ skipping 55 matching lines @@
         assertTrue(statusListener0.mOnStatusCalled);
         assertEquals(Status.INVALID, statusListener0.mStatus);
 
         urlRequest.start();
 
         // Should receive a valid status.
         TestStatusListener statusListener1 = new TestStatusListener();
         urlRequest.getStatus(statusListener1);
         statusListener1.waitUntilOnStatusCalled();
         assertTrue(statusListener1.mOnStatusCalled);
-        assertTrue(statusListener1.mStatus >= Status.IDLE);
-        assertTrue(statusListener1.mStatus <= Status.READING_RESPONSE);
+        assertTrue("Status is :" + statusListener1.mStatus, statusListener1.mStatus >= Status.IDLE);
+        assertTrue("Status is :" + statusListener1.mStatus,
+                statusListener1.mStatus <= Status.READING_RESPONSE);
 
         callback.waitForNextStep();
         assertEquals(ResponseStep.ON_RESPONSE_STARTED, callback.mResponseStep);
         callback.startNextRead(urlRequest);
 
         // Should receive a valid status.
         TestStatusListener statusListener2 = new TestStatusListener();
         urlRequest.getStatus(statusListener2);
         statusListener2.waitUntilOnStatusCalled();
         assertTrue(statusListener2.mOnStatusCalled);
@@ skipping 42 matching lines @@
             Status.convertLoadState(16);
             fail();
         } catch (AssertionError e) {
             // Expected.
         } catch (IllegalArgumentException e) {
             // If assertions are disabled, an IllegalArgumentException should be thrown.
             assertEquals("No request status found.", e.getMessage());
         }
     }
 }