[Mac][Material Design] Fix problem with tab close button redraw.

chrome/browser/ui/cocoa/tabs/tab_view.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/tabs/tab_view.h"
 
 #include "base/i18n/rtl.h"
 #include "base/logging.h"
 #include "base/mac/sdk_forward_declarations.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 585 matching lines @@
 
 - (SkColor)closeButtonColor {
   return [[controller_ closeButton] iconColor];
 }
 
 - (void)setState:(NSCellStateValue)state {
   if (state_ == state)
     return;
   state_ = state;
   [self setNeedsDisplay:YES];
+  [closeButton_ setNeedsDisplay:YES];
 }
 
 - (void)setClosing:(BOOL)closing {
   closing_ = closing;  // Safe because the property is nonatomic.
   // When closing, ensure clicks to the close button go nowhere.
   if (closing) {
     [closeButton_ setTarget:nil];
     [closeButton_ setAction:nil];
   }
 }
@@ skipping 329 matching lines @@
   NSAffineTransform* transform = [NSAffineTransform transform];
   [transform scaleXBy:-1 yBy:1];
   [transform translateXBy:-17.5 yBy:-0.25];
   [bezierPath transformUsingAffineTransform:transform];
 
   [[NSColor whiteColor] set];
   [bezierPath fill];
 }
 
 @end  // @implementation TabView(MaterialDesign)