Use precompiled headers for most large projects.

chrome_frame/chrome_frame.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.
 
 {
   'variables': {
     'chromium_code': 1,
 
     'variables': {
       'version_py_path': '../tools/build/version.py',
@@ skipping 11 matching lines @@
         'python': [
           '<(DEPTH)\\third_party\\python_26\\setup_env.bat && python'
         ],
       }, { # OS != win
         'python': [
           'python'
         ],
       }],
     ],
   },
+  'includes': [
+    '../build/win_precompile.gypi',
+  ],
   'target_defaults': {
     'dependencies': [
       '../chrome/chrome.gyp:chrome_resources',
       '../chrome/chrome.gyp:chrome_strings',
       '../chrome/chrome.gyp:packed_resources',
       '../chrome/chrome.gyp:theme_resources',
       '../skia/skia.gyp:skia',
     ],
     'defines': [ 'ISOLATION_AWARE_ENABLED=1' ],
     'include_dirs': [
@@ skipping 83 matching lines @@
         '<(SHARED_INTERMEDIATE_DIR)',
       ],
       'conditions': [
         # We can't instrument code for coverage if it depends on 3rd party
         # binaries that we don't have PDBs for. See here for more details:
         # http://connect.microsoft.com/VisualStudio/feedback/details/176188/can-not-disable-warning-lnk4099
         ['coverage==0', {
           'conditions': [
             ['OS=="win"', {
               'dependencies': [
-                '../breakpad/breakpad.gyp:breakpad_handler',              
+                '../breakpad/breakpad.gyp:breakpad_handler',
                 # TODO(slightlyoff): Get automation targets working on OS X
                 '../chrome/chrome.gyp:automation',
               ],
             }],
           ],
         }],
         ['OS=="win" and buildtype=="Official"', {
           'configurations': {
             'Release': {
               'msvs_settings': {
@@ skipping 899 matching lines @@
               # Use outputs of this action as inputs for the main target build.
               # Seems as a misnomer but makes this happy on Linux (scons).
               'process_outputs_as_sources': 1,
             },
           ],
         },
       ],
     }, ],  # 'coverage!=0'
   ],  # 'conditions'
 }