[Mac] Refactor bookmark bar controller

chrome/browser/ui/cocoa/bookmarks/bookmark_bar_view_cocoa.h

 // Copyright (c) 2010 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_COCOA_BOOKMARKS_BOOKMARK_BAR_VIEW_COCOA_H_
 #define CHROME_BROWSER_UI_COCOA_BOOKMARKS_BOOKMARK_BAR_VIEW_COCOA_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/mac/scoped_nsobject.h"
 
 @class BookmarkBarController;
 
+namespace bookmarks {
+const CGFloat kInitialNoItemTextFieldXOrigin = 5;
+}
+
 // A simple custom NSView for the bookmark bar used to prevent clicking and
 // dragging from moving the browser window.
 @interface BookmarkBarView : NSView {
  @private
   BOOL dropIndicatorShown_;
   CGFloat dropIndicatorPosition_;  // x position
 
   BookmarkBarController* controller_;
-  base::scoped_nsobject<NSTextField> noItemTextfield_;
+  base::scoped_nsobject<NSTextField> noItemTextField_;
   base::scoped_nsobject<NSButton> importBookmarksButton_;
-  base::scoped_nsobject<NSView> noItemContainer_;
 }
-- (NSTextField*)noItemTextfield;
+- (NSTextField*)noItemTextField;
 - (NSButton*)importBookmarksButton;
-- (NSView*)noItemContainer;
 
 - (instancetype)initWithController:(BookmarkBarController*)controller
                              frame:(NSRect)frame;
 - (void)registerForNotificationsAndDraggedTypes;
 
 // Exposed so the controller can nil itself out.
 @property(nonatomic, assign) BookmarkBarController* controller;
 @end
 
 @interface BookmarkBarView()  // TestingOrInternalAPI
 @property(nonatomic, readonly) BOOL dropIndicatorShown;
 @property(nonatomic, readonly) CGFloat dropIndicatorPosition;
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_BOOKMARKS_BOOKMARK_BAR_VIEW_COCOA_H_