Increase buffer size in CronetFixedModeOutputStream to 16kB

components/cronet/android/java/src/org/chromium/net/urlconnection/CronetFixedModeOutputStream.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.base.VisibleForTesting;
 import org.chromium.net.UploadDataProvider;
 import org.chromium.net.UploadDataSink;
 
 import java.io.IOException;
 import java.net.HttpRetryException;
 import java.net.ProtocolException;
 import java.nio.ByteBuffer;
 
 /**
  * An implementation of {@link java.io.OutputStream} to send data to a server,
  * when {@link CronetHttpURLConnection#setFixedLengthStreamingMode} is used.
  * This implementation does not buffer the entire request body in memory.
  * It does not support rewind. Note that {@link #write} should only be called
  * from the thread on which the {@link #mConnection} is created.
  */
 final class CronetFixedModeOutputStream extends CronetOutputStream {
     // CronetFixedModeOutputStream buffers up to this value and wait for UploadDataStream
     // to consume the data. This field is non-final, so it can be changed for tests.
-    // Using 2048 bytes is because the internal read buffer is 14520 for QUIC,
-    // 2852 for SPDY, and 16384 for normal stream. If a large value is used
-    // here, the buffer might not fit the internal buffer and compacting the buffer
-    // will be costly, see #read method below.
+    // Using 16384 bytes is because the internal read buffer is 14520 for QUIC,
+    // 16384 for SPDY, and 16384 for normal HTTP/1.1 stream.
     @VisibleForTesting
-    private static int sDefaultBufferLength = 2048;
+    private static int sDefaultBufferLength = 16384;
     private final CronetHttpURLConnection mConnection;
     private final MessageLoop mMessageLoop;
     private final long mContentLength;
     private final ByteBuffer mBuffer;
     private final UploadDataProvider mUploadDataProvider = new UploadDataProviderImpl();
     private long mBytesWritten;
 
     /**
      * Package protected constructor.
      * @param connection The CronetHttpURLConnection object.
@@ skipping 130 matching lines @@
     }
 
     /**
      * Sets the default buffer length for use in tests.
      */
     @VisibleForTesting
     static void setDefaultBufferLengthForTesting(int length) {
         sDefaultBufferLength = length;
     }
 }