Revert of Registration of DevTools bridge in GCD.

components/devtools_bridge/android/java/src/org/chromium/components/devtools_bridge/gcd/InstanceCredential.java

Index: components/devtools_bridge/android/java/src/org/chromium/components/devtools_bridge/gcd/InstanceCredential.java
diff --git a/components/devtools_bridge/android/java/src/org/chromium/components/devtools_bridge/gcd/InstanceCredential.java b/components/devtools_bridge/android/java/src/org/chromium/components/devtools_bridge/gcd/InstanceCredential.java
deleted file mode 100644
index 8fd360a68d8a90eb736988c8c5b7d492cb49b94b..0000000000000000000000000000000000000000
--- a/components/devtools_bridge/android/java/src/org/chromium/components/devtools_bridge/gcd/InstanceCredential.java
+++ /dev/null
@@ -1,28 +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.gcd;
-
-/**
- * Information provided by GCD when instance has registered. Instance id
- * can be used for:
- * 1. Making sure incoming messages are addressed to the instance.
- * 2. It needed when sending command results to GCD.
- * 3. For device unregistration.
- *
- * The Secret supposed to be used to authenticate the instance with OAuthClient
- * (it has no user credentials).
- */
-public final class InstanceCredential {
-    public final String id;
-    public final String secret;
-
-    public InstanceCredential(String id, String secret) {
-        assert id != null;
-        assert secret != null;
-
-        this.id = id;
-        this.secret = secret;
-    }
-}