Expose startNetLog / stopNetLog from HttpUrlRequestFactory.

components/cronet/android/java/src/org/chromium/net/ChromiumUrlRequestFactory.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 android.os.Build;
 
 import org.chromium.base.UsedByReflection;
@@ skipping 37 matching lines @@
     }
 
     @Override
     public ChromiumUrlRequest createRequest(String url, int requestPriority,
             Map<String, String> headers, WritableByteChannel channel,
             HttpUrlRequestListener listener) {
         return new ChromiumUrlRequest(mRequestContext, url, requestPriority,
                 headers, channel, listener);
     }
 
+    @Override
+    public void startNetLogToFile(String fileName) {
+        mRequestContext.startNetLogToFile(fileName);
+    }
+
+    @Override
+    public void stopNetLog() {
+        mRequestContext.stopNetLog();
+    }
+
     public ChromiumUrlRequestContext getRequestContext() {
         return mRequestContext;
     }
 }