[Mac][Material Design] Restore apps page shortcut icon in bookmarks bar.

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 435 matching lines @@
   // 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];
+
+  // The apps page shortcut button does not need to be updated.
+  if (self == [bookmarkBarController appsPageShortcutButton]) {
+    return;
+  }
+
   BOOL darkTheme = [[self window] hasDarkTheme];
   NSImage* theImage = nil;
   // Make sure the "off the side" button gets the chevron icon.
   if ([bookmarkBarController offTheSideButton] == self) {
     theImage = [bookmarkBarController offTheSideButtonImage:darkTheme];
   } else {
     theImage = [bookmarkBarController faviconForNode:[self bookmarkNode]
                                        forADarkTheme:darkTheme];
   }
 
@@ skipping 56 matching lines @@
   [[cell clipPathForFrame:bounds inView:self] setClip];
   [cell drawWithFrame:bounds inView:self];
 
   CGContextEndTransparencyLayer(cgContext);
   [image unlockFocus];
 
   return image.autorelease();
 }
 
 @end