Simplify devtools code on android and enable devtools for android content_shell.

content/browser/android/remote_debugging_controller.h

Index: content/browser/android/remote_debugging_controller.h
diff --git a/content/browser/android/remote_debugging_controller.h b/content/browser/android/remote_debugging_controller.h
deleted file mode 100644
index d7dbb1d19710e1f93c3458c03589e35fb267c893..0000000000000000000000000000000000000000
--- a/content/browser/android/remote_debugging_controller.h
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright (c) 2012 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.
-
-#ifndef CONTENT_BROWSER_ANDROID_REMOTE_DEBUGGING_CONTROLLER_H_
-#define CONTENT_BROWSER_ANDROID_REMOTE_DEBUGGING_CONTROLLER_H_
-
-#include <jni.h>
-
-namespace content {
-
-bool RegisterRemoteDebuggingController(JNIEnv* env);
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_ANDROID_REMOTE_DEBUGGING_CONTROLLER_H_