Remove extension-to-component migration mechanism

chrome/browser/ui/toolbar/component_action_delegate.h

+// Copyright 2017 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_UI_TOOLBAR_COMPONENT_ACTION_DELEGATE_H_
+#define CHROME_BROWSER_UI_TOOLBAR_COMPONENT_ACTION_DELEGATE_H_
+
+#include <string>
+
+// Object that knows how to manage component actions in the toolbar model.

[imcheng, 2017/02/08 22:59:29]

s/Object that knows how to manage/Manages

[takumif, 2017/02/09 00:05:56]

Done.

+class ComponentActionDelegate {
+ public:
+  // Adds or removes the component action labeled by |action_id| from the

[imcheng, 2017/02/08 22:59:29]

This needs a virtual destructor.

[takumif, 2017/02/09 00:05:56]

Done.

+  // toolbar model.  The caller will not add the same action twice.

[imcheng, 2017/02/08 22:59:29]

s/will/must

[takumif, 2017/02/09 00:05:56]

Done.

+  virtual void AddComponentAction(const std::string& action_id) = 0;
+  virtual void RemoveComponentAction(const std::string& action_id) = 0;
+
+  // Returns |true| if the toolbar model has an action for |action_id|.
+  virtual bool HasComponentAction(const std::string& action_id) const = 0;
+};
+
+#endif  // CHROME_BROWSER_UI_TOOLBAR_COMPONENT_ACTION_DELEGATE_H_