Added HttpUrlRequestListener OnResponseStarted callback.

components/cronet/android/java/src/org/chromium/net/ChromiumUrlRequest.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 java.io.IOException;
 import java.nio.ByteBuffer;
 import java.nio.channels.WritableByteChannel;
 import java.util.Map;
@@ skipping 94 matching lines @@
             // The server may ignore the request for a byte range.
             if (super.getHttpStatusCode() == 200) {
                 if (mContentLength != -1) {
                     mContentLength -= mOffset;
                 }
                 mSkippingToOffset = true;
             } else {
                 mSize = mOffset;
             }
         }
+        mListener.onResponseStarted(this);
     }
 
     @Override
     protected void onBytesRead(ByteBuffer buffer) {
         if (mContentLengthOverLimit) {
             return;
         }
 
         int size = buffer.remaining();
         mSize += size;
@@ skipping 54 matching lines @@
     @Override
     public ByteBuffer getByteBuffer() {
         return ((ChunkedWritableByteChannel)getSink()).getByteBuffer();
     }
 
     @Override
     public byte[] getResponseAsBytes() {
         return ((ChunkedWritableByteChannel)getSink()).getBytes();
     }
 }