views: Factor out Listener from Combobox into its own header file.

chrome/browser/ui/views/bookmarks/bookmark_bubble_view.h

Index: chrome/browser/ui/views/bookmarks/bookmark_bubble_view.h
diff --git a/chrome/browser/ui/views/bookmarks/bookmark_bubble_view.h b/chrome/browser/ui/views/bookmarks/bookmark_bubble_view.h
index 7a7d20bc9e764cfa3a73c6ef67e65f9cdc40f81d..110ca45719962f5c42d3cb5d693f78ec80d9502f 100644
--- a/chrome/browser/ui/views/bookmarks/bookmark_bubble_view.h
+++ b/chrome/browser/ui/views/bookmarks/bookmark_bubble_view.h
@@ -6,12 +6,14 @@
 #define CHROME_BROWSER_UI_VIEWS_BOOKMARKS_BOOKMARK_BUBBLE_VIEW_H_
 #pragma once
 
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
 #include "base/string16.h"
 #include "chrome/browser/bookmarks/recently_used_folders_combo_model.h"
 #include "googleurl/src/gurl.h"
 #include "ui/views/bubble/bubble_delegate.h"
 #include "views/controls/button/button.h"
-#include "views/controls/combobox/combobox.h"
+#include "views/controls/combobox/combobox_listener.h"
 #include "views/controls/link_listener.h"
 
 class Profile;
@@ -28,7 +30,7 @@ class Textfield;
 class BookmarkBubbleView : public views::BubbleDelegateView,
                            public views::LinkListener,
                            public views::ButtonListener,
-                           public views::Combobox::Listener {
+                           public views::ComboboxListener {
  public:
   static void ShowBubble(views::View* anchor_view,
                          Profile* profile,
@@ -65,16 +67,19 @@ class BookmarkBubbleView : public views::BubbleDelegateView,
   // Returns the title to display.
   string16 GetTitle();
 
-  // views::LinkListener method, either unstars the item or shows the bookmark
-  // editor (depending upon which link was clicked).
+  // Overridden from views::LinkListener:
+  // Either unstars the item or shows the bookmark editor (depending upon which
+  // link was clicked).
   virtual void LinkClicked(views::Link* source, int event_flags) OVERRIDE;
 
-  // ButtonListener method, closes the bubble or opens the edit dialog.
+  // Overridden from views::ButtonListener:
+  // Closes the bubble or opens the edit dialog.
   virtual void ButtonPressed(views::Button* sender,
                              const views::Event& event) OVERRIDE;
 
-  // Combobox::Listener method. Changes the parent of the bookmark.
-  virtual void ItemChanged(views::Combobox* combobox,
+  // Overridden from views::ComboboxListener:
+  // Changes the parent of the bookmark.
+  virtual void ItemChanged(views::Combobox* combo_box,
                            int prev_index,
                            int new_index) OVERRIDE;