Use precompiled headers for most large projects.

chrome/installer/mini_installer.gyp

 {
   'variables': {
     'version_py': '../../chrome/tools/build/version.py',
     'version_path': '../../chrome/VERSION',
     'lastchange_path': '<(SHARED_INTERMEDIATE_DIR)/build/LASTCHANGE',
     # 'branding_dir' is set in the 'conditions' section at the bottom.
     'msvs_use_common_release': 0,
     'msvs_use_common_linker_extras': 0,
   },
+  'includes': [
+    '../../build/win_precompile.gypi',
+  ],
   'conditions': [
     ['OS=="win"', {
       'target_defaults': {
         'dependencies': [
           '../chrome.gyp:chrome',
           '../chrome.gyp:chrome_nacl_win64',
           '../chrome.gyp:chrome_dll',
           '../chrome.gyp:default_extensions',
           '../chrome.gyp:setup',
         ],
@@ skipping 206 matching lines @@
       'variables': {
          'branding_dir': '../app/theme/google_chrome',
       },
     }, { # else branding!="Chrome"
       'variables': {
          'branding_dir': '../app/theme/chromium',
       },
     }],
   ],
 }