Add and use gfx::ScopedNSGraphicsContextState (ui/gfx/scoped_ns_graphics_context_state_mac.h).

ui/ui_gfx.gypi

 # 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.
 
 {
   'targets': [
     {
       # TODO(rsesek): Remove this target once ui_unittests is run on the
       # waterfall instead of gfx_unittests.
       'target_name': 'gfx_unittests',
@@ skipping 80 matching lines @@
         'gfx/platform_font_gtk.cc',
         'gfx/platform_font_mac.h',
         'gfx/platform_font_mac.mm',
         'gfx/platform_font_win.h',
         'gfx/platform_font_win.cc',
         'gfx/point.cc',
         'gfx/point.h',
         'gfx/rect.cc',
         'gfx/rect.h',
         'gfx/scoped_cg_context_state_mac.h',
+        'gfx/scoped_ns_graphics_context_save_gstate_mac.h',
+        'gfx/scoped_ns_graphics_context_save_gstate_mac.mm',
         'gfx/scrollbar_size.cc',
         'gfx/scrollbar_size.h',
         'gfx/size.cc',
         'gfx/size.h',
         'gfx/skbitmap_operations.cc',
         'gfx/skbitmap_operations.h',
         'gfx/skia_util.cc',
         'gfx/skia_util.h',
         'gfx/skia_utils_gtk.cc',
         'gfx/skia_utils_gtk.h',
@@ skipping 67 matching lines @@
     },
 
   ],
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: