Linux: Use an administrative directory from Precise on Trusty for deb package builds.

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',
     'libpeer_target_type%': 'static_library',
     # 'branding_dir' is set in the 'conditions' section at the bottom.
   },
@@ skipping 451 matching lines @@
           '<(PRODUCT_DIR)/xdg-settings',
           '<(PRODUCT_DIR)/locales/en-US.pak',
           '<(PRODUCT_DIR)/nacl_helper',
           '<(PRODUCT_DIR)/nacl_helper_bootstrap',
           '<(PRODUCT_DIR)/PepperFlash/libpepflashplayer.so',
           '<(PRODUCT_DIR)/PepperFlash/manifest.json',
           '<@(default_apps_list_linux_dest)',
         ],
         'flock_bash': ['flock', '--', '/tmp/linux_package_lock', 'bash'],
         'deb_build': '<(PRODUCT_DIR)/installer/debian/build.sh',
+        'dpkg_dir': '<!(cd <(DEPTH) && pwd -P)/chrome/installer/linux/precise_var_dpkg',
         'rpm_build': '<(PRODUCT_DIR)/installer/rpm/build.sh',
         'deb_cmd': ['<@(flock_bash)', '<(deb_build)', '-o' '<(PRODUCT_DIR)',
-                    '-b', '<(PRODUCT_DIR)', '-a', '<(target_arch)'],
+                    '-b', '<(PRODUCT_DIR)', '-a', '<(target_arch)',
+                    '-d', '<(dpkg_dir)'],
         'rpm_cmd': ['<@(flock_bash)', '<(rpm_build)', '-o' '<(PRODUCT_DIR)',
                     '-b', '<(PRODUCT_DIR)', '-a', '<(target_arch)'],
         'conditions': [
           ['target_arch=="ia32"', {
             'deb_arch': 'i386',
             'rpm_arch': 'i386',
             'packaging_files_binaries': [
               '<(PRODUCT_DIR)/nacl_irt_x86_32.nexe',
               '<(PRODUCT_DIR)/libwidevinecdmadapter.so',
               '<(PRODUCT_DIR)/libwidevinecdm.so',
@@ skipping 604 matching lines @@
          'branding_dir_100': 'app/theme/default_100_percent/google_chrome',
       },
     }, { # else branding!="Chrome"
       'variables': {
          'branding_dir': 'app/theme/chromium',
          'branding_dir_100': 'app/theme/default_100_percent/chromium',
       },
     }],
   ],
 }