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

chrome/browser/android/devtools_server.h

+// 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 CHROME_BROWSER_ANDROID_DEVTOOLS_SERVER_H_
+#define CHROME_BROWSER_ANDROID_DEVTOOLS_SERVER_H_
+
+#include <string>
+#include "base/basictypes.h"
+
+namespace content {
+class DevToolsHttpHandler;
+}
+
+// This class controls Developer Tools remote debugging server.
+class DevToolsServer {
+ public:
+  DevToolsServer();
+  ~DevToolsServer();
+
+  // Opens linux abstract socket to be ready for remote debugging.
+  void Start();
+
+  // Closes debugging socket, stops debugging.
+  void Stop();
+
+  bool IsStarted() const;
+
+ private:
+  content::DevToolsHttpHandler* protocol_handler_;
+
+  DISALLOW_COPY_AND_ASSIGN(DevToolsServer);
+};
+
+#endif  // CHROME_BROWSER_ANDROID_DEVTOOLS_SERVER_H_