[Mac][Material Design] Fix strange Apps button highlight in dark themes.

chrome/browser/ui/cocoa/bookmarks/bookmark_bar_controller.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_bar_controller.h"
 
 #include <stddef.h>
 
 #import "base/mac/bundle_locations.h"
 #import "base/mac/foundation_util.h"
@@ skipping 1955 matching lines @@
 // bookmark bar that is not attached to any bookmark node.
 // TODO(jrg): move much of the cell config into the BookmarkButtonCell class.
 - (BookmarkButtonCell*)cellForCustomButtonWithText:(NSString*)text
                                              image:(NSImage*)image {
   BookmarkButtonCell* cell =
       [BookmarkButtonCell buttonCellWithText:text
                                        image:image
                               menuController:contextMenuController_];
   if (ui::MaterialDesignController::IsModeMaterial()) {
     [cell setTag:kMaterialStandardButtonTypeWithLimitedClickFeedback];
+    [cell setHighlightsBy:NSNoCellMask];
   } else {
     [cell setTag:kStandardButtonTypeWithLimitedClickFeedback];
   }
 
   // Note: a quirk of setting a cell's text color is that it won't work
   // until the cell is associated with a button, so we can't theme the cell yet.
 
   return cell;
 }
 
@@ skipping 1104 matching lines @@
 - (id<BookmarkButtonControllerProtocol>)controllerForNode:
     (const BookmarkNode*)node {
   // See if it's in the bar, then if it is in the hierarchy of visible
   // folder menus.
   if (bookmarkModel_->bookmark_bar_node() == node)
     return self;
   return [folderController_ controllerForNode:node];
 }
 
 @end