[Mac] Remove bookmark bar NIB

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/strings/sys_string_conversions.h"
 #include "chrome/browser/ui/cocoa/bookmarks/bookmark_bar_constants.h"
 #import "chrome/browser/ui/cocoa/bookmarks/bookmark_button.h"
@@ skipping 19 matching lines @@
 const int kHierarchyButtonLeftPadding = 11;
 
 const int kIconTextSpacer = 4;
 const int kTextRightPadding = 4;
 const int kIconLeftPadding = 4;
 
 const int kDefaultFontSize = 12;
 
 };  // namespace
 
+// TODO(lgrey): Bake setting the chevron image into this
+// class instead of setting it externally.
 @interface OffTheSideButtonCell : BookmarkButtonCell
 
 - (NSString*)accessibilityTitle;
 
 @end
 @implementation OffTheSideButtonCell
 
 - (BOOL)isOffTheSideButtonCell {
   return YES;
 }
@@ skipping 49 matching lines @@
                    image:(NSImage*)image
           menuController:(BookmarkContextMenuCocoaController*)menuController {
   id buttonCell =
       [[[BookmarkButtonCell alloc] initWithText:text
                                           image:image
                                  menuController:menuController]
        autorelease];
   return buttonCell;
 }
 
++ (id)offTheSideButtonCell {
+  return [[[OffTheSideButtonCell alloc] init] autorelease];
+}
+
 - (id)initForNode:(const BookmarkNode*)node
              text:(NSString*)text
             image:(NSImage*)image
    menuController:(BookmarkContextMenuCocoaController*)menuController {
   if ((self = [super initTextCell:text])) {
     menuController_ = menuController;
     [self configureBookmarkButtonCell];
     [self setTextColor:[NSColor blackColor]];
     [self setBookmarkNode:node];
     // When opening a bookmark folder, the default behavior is that the
@@ skipping 311 matching lines @@
   const CGFloat kLineWidth = [controlView cr_lineWidth];
   if ([self isMaterialDesignButtonType] && ![self isFolderButtonCell] &&
       kLineWidth < 1) {
     return -kLineWidth;
   }
   return 0.0;
 }
 
 
 @end