Revert of Merge NativeTextfieldViews into views::Textfield.

ui/views/controls/textfield/textfield_controller.h

Index: ui/views/controls/textfield/textfield_controller.h
diff --git a/ui/views/controls/textfield/textfield_controller.h b/ui/views/controls/textfield/textfield_controller.h
index be9b9389f808bf1599b2ceaf17b0b6dc557525c8..bebec1c298d36ddf17d90d08b68f86cc4fc10362 100644
--- a/ui/views/controls/textfield/textfield_controller.h
+++ b/ui/views/controls/textfield/textfield_controller.h
@@ -79,6 +79,26 @@
   // Gives the controller a chance to modify the context menu contents.
   virtual void UpdateContextMenu(ui::SimpleMenuModel* menu_contents) {}
 
+  // Returns true if the |command_id| should be enabled in the context menu.
+  virtual bool IsCommandIdEnabled(int command_id) const;
+
+  // Returns true if the item label for the |command_id| is dynamic in the
+  // context menu.
+  virtual bool IsItemForCommandIdDynamic(int command_id) const;
+
+  // Returns the label string for the |coomand_id|.
+  virtual base::string16 GetLabelForCommandId(int command_id) const;
+
+  // Returns whether the controller handles the specified command. This is used
+  // to handle a command the textfield would normally handle. For example, to
+  // have the controller handle |IDS_APP_PASTE| override and return true if
+  // |command_id| == |IDS_APP_PASTE|.
+  // This is only invoked if the command is enabled.
+  virtual bool HandlesCommand(int command_id) const;
+
+  // Execute context menu command specified by |command_id|.
+  virtual void ExecuteCommand(int command_id, int event_flag) {}
+
  protected:
   virtual ~TextfieldController() {}
 };