Use precompiled headers for most large projects.

third_party/sfntly/sfntly.gyp

 # 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': [
     {
       'target_name': 'sfntly',
       'type': 'static_library',
+      'msvs_disable_precompiled_header': '1',
       'sources': [
         'src/sfntly/cmap_table.cc',
         'src/sfntly/cmap_table.h',
         'src/sfntly/data/byte_array.cc',
         'src/sfntly/data/byte_array.h',
         'src/sfntly/data/font_data.cc',
         'src/sfntly/data/font_data.h',
         'src/sfntly/data/font_input_stream.cc',
         'src/sfntly/data/font_input_stream.h',
         'src/sfntly/data/font_output_stream.cc',
@@ skipping 60 matching lines @@
       # This macro must be define to suppress the use of exception
       'defines': [
         'SFNTLY_NO_EXCEPTION',
       ],
       'dependencies' : [
         '../icu/icu.gyp:icuuc',
       ],
     },
   ]
 }