[Cronet] Expose HttpURLConnection API from CronetEngine, not classes

components/cronet/android/java/src/org/chromium/net/urlconnection/CronetHttpURLConnection.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.urlconnection;
 
 import android.util.Pair;
 
 import org.chromium.base.Log;
 import org.chromium.net.CronetEngine;
@@ skipping 14 matching lines @@
 import java.nio.ByteBuffer;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.TreeMap;
 
 /**
  * An implementation of {@link HttpURLConnection} that uses Cronet to send
  * requests and receive responses.
+ * @deprecated use {@link CronetEngine#openConnection}.
  */
-class CronetHttpURLConnection extends HttpURLConnection {
+public class CronetHttpURLConnection extends HttpURLConnection {
     private static final String TAG = "cr.CronetHttpURLConn";
     private static final String CONTENT_LENGTH = "Content-Length";
     private final CronetEngine mCronetEngine;
     private final MessageLoop mMessageLoop;
     private UrlRequest mRequest;
     private final List<Pair<String, String>> mRequestHeaders;
 
     private CronetInputStream mInputStream;
     private CronetOutputStream mOutputStream;
     private ResponseInfo mResponseInfo;
@@ skipping 490 matching lines @@
     }
 
     /**
      * Returns whether the client has used {@link #setChunkedStreamingMode} to
      * set chunked encoding for upload.
      */
     private boolean isChunkedUpload() {
         return chunkLength > 0;
     }
 }