diff -r 38fac6d0521d -r 42208b2f224e src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/internal/WindowUpdateSender.java
--- a/src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/internal/WindowUpdateSender.java	Tue Feb 06 19:37:56 2018 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,91 +0,0 @@
-/*
- * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.  Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-package jdk.incubator.http.internal;
-
-import java.lang.System.Logger.Level;
-import jdk.incubator.http.internal.frame.SettingsFrame;
-import jdk.incubator.http.internal.frame.WindowUpdateFrame;
-import jdk.incubator.http.internal.common.Utils;
-
-import java.util.concurrent.atomic.AtomicInteger;
-
-abstract class WindowUpdateSender {
-
-    final static boolean DEBUG = Utils.DEBUG;
-    final System.Logger debug =
-            Utils.getDebugLogger(this::dbgString, DEBUG);
-
-    final int limit;
-    final Http2Connection connection;
-    final AtomicInteger received = new AtomicInteger(0);
-
-    WindowUpdateSender(Http2Connection connection) {
-        this(connection, connection.clientSettings.getParameter(SettingsFrame.INITIAL_WINDOW_SIZE));
-    }
-
-    WindowUpdateSender(Http2Connection connection, int initWindowSize) {
-        this(connection, connection.getMaxReceiveFrameSize(), initWindowSize);
-    }
-
-    WindowUpdateSender(Http2Connection connection, int maxFrameSize, int initWindowSize) {
-        this.connection = connection;
-        int v0 = Math.max(0, initWindowSize - maxFrameSize);
-        int v1 = (initWindowSize + (maxFrameSize - 1)) / maxFrameSize;
-        v1 = v1 * maxFrameSize / 2;
-        // send WindowUpdate heuristic:
-        // - we got data near half of window size
-        //   or
-        // - remaining window size reached max frame size.
-        limit = Math.min(v0, v1);
-        debug.log(Level.DEBUG, "maxFrameSize=%d, initWindowSize=%d, limit=%d",
-                maxFrameSize, initWindowSize, limit);
-    }
-
-    abstract int getStreamId();
-
-    void update(int delta) {
-        debug.log(Level.DEBUG, "update: %d", delta);
-        if (received.addAndGet(delta) > limit) {
-            synchronized (this) {
-                int tosend = received.get();
-                if( tosend > limit) {
-                    received.getAndAdd(-tosend);
-                    sendWindowUpdate(tosend);
-                }
-            }
-        }
-    }
-
-    void sendWindowUpdate(int delta) {
-        debug.log(Level.DEBUG, "sending window update: %d", delta);
-        connection.sendUnorderedFrame(new WindowUpdateFrame(getStreamId(), delta));
-    }
-
-    String dbgString() {
-        return "WindowUpdateSender(stream: " + getStreamId() + ")";
-    }
-
-}