[Mac] Refactor bookmark bar controller

chrome/browser/ui/cocoa/bookmarks/bookmark_button_cell.mm

 // Copyright (c) 2011 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.
 
 #import "chrome/browser/ui/cocoa/bookmarks/bookmark_button_cell.h"
 
 #include "base/logging.h"
 #include "base/metrics/user_metrics.h"
 #include "base/strings/sys_string_conversions.h"
 #include "chrome/browser/ui/cocoa/bookmarks/bookmark_bar_constants.h"
@@ skipping 63 matching lines @@
 - (void)configureBookmarkButtonCell;
 - (void)applyTextColor;
 // Returns the title the button cell displays. Note that a button cell can
 // have a title string assigned but it won't be visible if its image position
 // is NSImageOnly.
 - (NSString*)visibleTitle;
 // Returns the dictionary of attributes to associate with the button title.
 - (NSDictionary*)titleTextAttributes;
 @end
 
-
 @implementation BookmarkButtonCell
 
 @synthesize startingChildIndex = startingChildIndex_;
 @synthesize drawFolderArrow = drawFolderArrow_;
 
 + (id)buttonCellForNode:(const BookmarkNode*)node
                    text:(NSString*)text
                   image:(NSImage*)image
          menuController:(BookmarkContextMenuCocoaController*)menuController {
   id buttonCell =
@@ skipping 376 matching lines @@
 
 // Returns |title| with newlines and line feeds replaced with
 // spaces.
 + (NSString*)cleanTitle:(NSString*)title {
   title = [title stringByReplacingOccurrencesOfString:@"\n" withString:@" "];
   title = [title stringByReplacingOccurrencesOfString:@"\r" withString:@" "];
   return title;
 }
 
 @end