chrome: Extract CommandUpdaterDelegate into its own header file.

chrome/browser/command_updater_delegate.h

+// Copyright 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_COMMAND_UPDATER_DELEGATE_H_
+#define CHROME_BROWSER_COMMAND_UPDATER_DELEGATE_H_
+
+#include "webkit/glue/window_open_disposition.h"
+
+// Implement this interface so that your object can execute commands when
+// needed.
+class CommandUpdaterDelegate {
+ public:
+  // Performs the action associated with the command with the specified ID and
+  // using the given disposition.
+  virtual void ExecuteCommandWithDisposition(
+      int id,
+      WindowOpenDisposition disposition) = 0;
+
+ protected:
+  virtual ~CommandUpdaterDelegate() {}
+};
+
+#endif  // CHROME_BROWSER_COMMAND_UPDATER_DELEGATE_H_