Adding a required dependency on setup.exe by mini_installer.exe....

chrome/installer/installer.gyp

 {
   'variables': {
     'version_py': '../../chrome/tools/build/version.py',
     'VERSION': '../../chrome/VERSION',
     # 'BRANDING' is set in the 'conditions' section at the bottom.
   },
   'includes': [
     '../../build/common.gypi',
   ],
   'targets': [
@@ skipping 294 matching lines @@
           },
         },
         {
           'target_name': 'mini_installer',
           'type': 'executable',
           'msvs_guid': '24A5AC7C-280B-4899-9153-6BA570A081E7',
           'msvs_existing_vcproj': 'mini_installer/mini_installer.vcproj',
           'dependencies': [
             '../chrome.gyp:app',
             '../chrome.gyp:chrome_dll',
+            'setup',
           ],
           'include_dirs': [
             '../..',
             '<(PRODUCT_DIR)',
             '<(INTERMEDIATE_DIR)',
           ],
           'sources': [
             'mini_installer/chrome.release',
             'mini_installer/mini_installer.cc',
             'mini_installer/mini_installer.h',
@@ skipping 249 matching lines @@
       'variables': {
          'BRANDING': '../../chrome/app/theme/google_chrome/BRANDING',
       },
     }, { # else branding!="Chrome"
       'variables': {
          'BRANDING': '../../chrome/app/theme/chromium/BRANDING',
       },
     }],
   ],
 }