Revert of DevTools socket tunnel.

components/devtools_bridge/android/java/src/org/chromium/components/devtools_bridge/AbstractDataChannel.java

Index: components/devtools_bridge/android/java/src/org/chromium/components/devtools_bridge/AbstractDataChannel.java
diff --git a/components/devtools_bridge/android/java/src/org/chromium/components/devtools_bridge/AbstractDataChannel.java b/components/devtools_bridge/android/java/src/org/chromium/components/devtools_bridge/AbstractDataChannel.java
deleted file mode 100644
index e92c6db73126aef45f655d96e5f0f3705091634e..0000000000000000000000000000000000000000
--- a/components/devtools_bridge/android/java/src/org/chromium/components/devtools_bridge/AbstractDataChannel.java
+++ /dev/null
@@ -1,77 +0,0 @@
-// 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.components.devtools_bridge;
-
-import java.nio.ByteBuffer;
-
-/**
- * Limited view on org.webrtc.DataChannel. Abstraction layer helps with:
- * 1. Mocking in tests. There is no need to emulate full set of features of the DataChannel.
- * 2. Allows both native and Java API implementation for WebRTC data channel.
- * 3. Hides unused features.
- * Only SCTP data channels supported.
- * Data channel is thread safe (except the dispose method).
- */
-public abstract class AbstractDataChannel {
-    /**
-     *  Observer's callbacks are called on WebRTC signaling thread (or it's equivalent in tests).
-     */
-    public interface Observer {
-        void onStateChange(State state);
-
-        /**
-         * TEXT and BINARY messages should be handled equally. Size of the message is
-         * |message|.remaining(). |message| may reference to a native buffer on stack so
-         * the reference to the buffer must not outlive the invocation.
-         */
-        void onMessage(ByteBuffer message);
-    }
-
-    /**
-     * Type is only significant for JavaScript-based counterpart. TEXT messages will
-     * be observed as strings, BINARY as ByteArray's.
-     */
-    public enum MessageType {
-        TEXT, BINARY
-    }
-
-    /**
-     * State of the data channel.
-     * Only 2 states of channel are important here: OPEN and everything else.
-     */
-    public enum State {
-        OPEN, CLOSED
-    }
-
-    /**
-     * Registers an observer.
-     */
-    public abstract void registerObserver(Observer observer);
-
-    /**
-     * Unregisters the previously registered observer.
-     * Observer unregistration synchronized with signaling thread. If some data modified
-     * in observer callbacks without additional synchronization it's safe to access
-     * this data on the current thread after calling this method.
-     */
-    public abstract void unregisterObserver();
-
-    /**
-     * Sending message to the data channel.
-     * Message size is |message|.remaining().
-     */
-    public abstract void send(ByteBuffer message, MessageType type);
-
-    /**
-     * Closing data channel. Both channels in the pair will change state to CLOSED.
-     */
-    public abstract void close();
-
-    /**
-     * Releases native objects (if any). Closes data channel. No other methods are allowed after it
-     * (in multithread scenario needs synchronization with access to the data channel).
-     */
-    public abstract void dispose();
-}