Expose startNetLog / stopNetLog from HttpUrlRequestFactory.

components/cronet/android/java/src/org/chromium/net/HttpUrlConnectionUrlRequestFactory.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.content.Context;
 
+import java.io.IOException;
+import java.io.PrintWriter;
 import java.nio.channels.WritableByteChannel;
 import java.util.Map;
 
 /**
  * Network request using {@link java.net.HttpURLConnection}.
  */
 class HttpUrlConnectionUrlRequestFactory extends HttpUrlRequestFactory {
 
     private final Context mContext;
 
@@ skipping 19 matching lines @@
                 headers, listener);
     }
 
     @Override
     public HttpUrlRequest createRequest(String url, int requestPriority,
             Map<String, String> headers, WritableByteChannel channel,
             HttpUrlRequestListener listener) {
         return new HttpUrlConnectionUrlRequest(mContext, url, requestPriority,
                 headers, channel, listener);
     }
+
+    @Override
+    public void startNetLogToFile(String fileName) {
+        try {
+            PrintWriter out = new PrintWriter(fileName);
+            out.println("NetLog is not supported by " + getName());
+            out.close();
+        } catch (IOException e) {
+            // Ignore any exceptions.
+        }
+    }
+
+    @Override
+    public void stopNetLog() {
+    }
 }