Add support for multi resolution icons

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 49 matching lines @@
         'gfx/canvas_skia.h',
         'gfx/canvas_skia.cc',
         'gfx/canvas_skia_linux.cc',
         'gfx/canvas_skia_mac.mm',
         'gfx/canvas_skia_paint.h',
         'gfx/canvas_skia_win.cc',
         'gfx/codec/jpeg_codec.cc',
         'gfx/codec/jpeg_codec.h',
         'gfx/codec/png_codec.cc',
         'gfx/codec/png_codec.h',
+        'gfx/codec/tiff_codec.h',
+        'gfx/codec/tiff_codec_linux.cc',
+        'gfx/codec/tiff_codec_mac.mm',
+        'gfx/codec/tiff_codec_win.cc',
         'gfx/color_utils.cc',
         'gfx/color_utils.h',
         'gfx/favicon_size.h',
         'gfx/font.h',
         'gfx/font.cc',
         'gfx/gfx_paths.cc',
         'gfx/gfx_paths.h',
         'gfx/image.cc',
         'gfx/image.h',
         'gfx/image_mac.mm',
@@ skipping 98 matching lines @@
     },
 
   ],
 }
 
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