Add infrastructure enabling tests of installer upgrade scenarios....

chrome/chrome.gyp

 # Copyright (c) 2010 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',
       'version_path': 'VERSION',
@@ skipping 1607 matching lines @@
     },],  # OS=="linux"
     ['OS=="win"',
       { 'targets': [
         {
           # TODO(sgk):  remove this when we change the buildbots to
           # use the generated build\all.sln file to build the world.
           'target_name': 'pull_in_all',
           'type': 'none',
           'dependencies': [
             'installer/mini_installer.gyp:*',
+            'installer/upgrade_test.gyp:*',
             '../app/app.gyp:*',
             '../base/base.gyp:*',
             '../ceee/ceee.gyp:*',
             '../chrome_frame/chrome_frame.gyp:*',
             '../gfx/gfx.gyp:*',
             '../ipc/ipc.gyp:*',
             '../media/media.gyp:*',
             '../net/net.gyp:*',
             '../ppapi/ppapi.gyp:*',
             '../printing/printing.gyp:*',
@@ skipping 287 matching lines @@
       }],  # targets
     }],  # OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris"
   ],  # 'conditions'
 }
 
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