[Cronet] Create Builders, rename UrlRequestContext to CronetEngine

components/cronet/android/java/src/org/chromium/net/urlconnection/CronetBufferedOutputStream.java

 // Copyright 2015 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 org.chromium.net.UploadDataProvider;
 import org.chromium.net.UploadDataSink;
 
 import java.io.IOException;
@@ skipping 128 matching lines @@
 
     private class UploadDataProviderImpl extends UploadDataProvider {
         @Override
         public long getLength() {
             // This method is supposed to be called just before starting the request.
             // If content length is not initially passed in, the number of bytes
             // written will be used as the content length.
             // TODO(xunjieli): Think of a less fragile way, since getLength() can be
             // potentially called in other places in the future.
             if (mInitialContentLength == -1) {
-                return mBuffer.position();
+                // Account for the fact that setConnected() flip()s mBuffer.
+                return mConnected ? mBuffer.limit() : mBuffer.position();
             }
             return mInitialContentLength;
         }
 
         @Override
         public void read(UploadDataSink uploadDataSink, ByteBuffer byteBuffer) {
             final int availableSpace = byteBuffer.remaining();
             if (availableSpace < mBuffer.remaining()) {
                 byteBuffer.put(mBuffer.array(), mBuffer.position(), availableSpace);
                 mBuffer.position(mBuffer.position() + availableSpace);
             } else {
                 byteBuffer.put(mBuffer);
             }
             uploadDataSink.onReadSucceeded(false);
         }
 
         @Override
         public void rewind(UploadDataSink uploadDataSink) {
             mBuffer.position(0);
             uploadDataSink.onRewindSucceeded();
         }
     }
 }