cocoa browser: remove non-MD bookmark bar support

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

 // Copyright (c) 2012 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.h"
 
 #include <cmath>
 
 #include "base/logging.h"
 #include "base/mac/foundation_util.h"
@@ skipping 415 matching lines @@
   if (backgroundColor_) {
     [backgroundColor_ set];
     NSRectFill(rect);
   } else {
     [self cr_drawUsingAncestor:bookmarkBarToolbarView inRect:(NSRect)rect];
   }
   [super drawRect:rect];
 }
 
 - (void)updateIconToMatchTheme {
-  if (!ui::MaterialDesignController::IsModeMaterial()) {
-    return;
-  }
-
   // During testing, the window might not be a browser window, and the
   // superview might not be a BookmarkBarView.
   if (![[self window] respondsToSelector:@selector(hasDarkTheme)] ||
       ![[self superview] isKindOfClass:[BookmarkBarView class]]) {
     return;
   }
 
   BookmarkBarView* bookmarkBarView =
       base::mac::ObjCCastStrict<BookmarkBarView>([self superview]);
   BookmarkBarController* bookmarkBarController = [bookmarkBarView controller];
@@ skipping 72 matching lines @@
   [[cell clipPathForFrame:bounds inView:self] setClip];
   [cell drawWithFrame:bounds inView:self];
 
   CGContextEndTransparencyLayer(cgContext);
   [image unlockFocus];
 
   return image.autorelease();
 }
 
 @end