Factor out logic to find chrome.exe from Omaha client state.

chrome/chrome_installer.gypi

 # Copyright (c) 2012 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': {
     'lastchange_path': '../build/util/LASTCHANGE',
     # 'branding_dir' is set in the 'conditions' section at the bottom.
   },
   'conditions': [
@@ skipping 12 matching lines @@
             'installer/gcapi/gcapi.def',
             'installer/gcapi/gcapi_dll.cc',
           ],
         },
         {
           'target_name': 'gcapi_lib',
           'type': 'static_library',
           'dependencies': [
             'installer_util',
             '../base/base.gyp:base',
+            '../chrome/chrome.gyp:launcher_support',
             '../google_update/google_update.gyp:google_update',
           ],
           'include_dirs': [
             '..',
           ],
           'sources': [
             'installer/gcapi/gcapi.cc',
             'installer/gcapi/gcapi.h',
             'installer/gcapi/gcapi_omaha_experiment.cc',
             'installer/gcapi/gcapi_omaha_experiment.h',
@@ skipping 995 matching lines @@
       'variables': {
          'branding_dir': 'app/theme/google_chrome',
       },
     }, { # else branding!="Chrome"
       'variables': {
          'branding_dir': 'app/theme/chromium',
       },
     }],
   ],
 }