Add HttpUrlConnection backed implementation of CronetEngine.

components/cronet/android/java/src/org/chromium/net/CronetUrlRequestContext.java

 // Copyright 2014 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.Build;
 import android.os.ConditionVariable;
 import android.os.Handler;
 import android.os.Looper;
@@ skipping 101 matching lines @@
                     quicHint.mAlternatePort);
         }
         for (Builder.Pkp pkp : builder.publicKeyPins()) {
             nativeAddPkp(urlRequestContextConfig, pkp.mHost, pkp.mHashes, pkp.mIncludeSubdomains,
                     pkp.mExpirationDate.getTime());
         }
         return urlRequestContextConfig;
     }
 
     @Override
-    public UrlRequest createRequest(String url, UrlRequest.Callback callback, Executor executor) {
-        synchronized (mLock) {
-            checkHaveAdapter();
-            return new CronetUrlRequest(this, mUrlRequestContextAdapter, url,
-                    UrlRequest.Builder.REQUEST_PRIORITY_MEDIUM, callback, executor);
-        }
-    }
-
-    @Override
     public UrlRequest createRequest(String url, UrlRequest.Callback callback, Executor executor,
             @UrlRequest.Builder.RequestPriority int priority) {
         synchronized (mLock) {
             checkHaveAdapter();
             return new CronetUrlRequest(
                     this, mUrlRequestContextAdapter, url, priority, callback, executor);
         }
     }
 
     @Override
@@ skipping 315 matching lines @@
     @NativeClassQualifiedName("CronetURLRequestContextAdapter")
     private native void nativeEnableNetworkQualityEstimator(
             long nativePtr, boolean useLocalHostRequests, boolean useSmallerResponses);
 
     @NativeClassQualifiedName("CronetURLRequestContextAdapter")
     private native void nativeProvideRTTObservations(long nativePtr, boolean should);
 
     @NativeClassQualifiedName("CronetURLRequestContextAdapter")
     private native void nativeProvideThroughputObservations(long nativePtr, boolean should);
 }