Generated header files apparently require hard_dependency

chrome/chrome_browser_ui.gypi

 # Copyright 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': {
     # There are two sections of sources:
     # * "Platform"-based sources (OS, toolkit, etc.)
     # * Feature/directory-based sources (e.g., history, printing)
 
@@ skipping 2903 matching lines @@
           ],
           'conditions': [
             ['chromeos == 0 and (OS!="mac" or mac_views_browser==1)', {
               'sources': [ '<@(chrome_browser_ui_views_non_chromeos_sources)' ],
             }],
             ['use_ash == 1', {
               'sources': [ '<@(chrome_browser_ui_ash_views_sources)' ],
             }],
             ['OS!="mac"', {
               'sources': [ '<@(chrome_browser_ui_views_non_mac_sources)' ],
+              'dependencies': [
+                '../ui/gfx/gfx.gyp:gfx_vector_icons',
+              ],
               'conditions': [
                 ['enable_extensions==1', {
                   'sources': [ '<@(chrome_browser_ui_views_extensions_non_mac_sources)' ],
                 }],
               ],
             }],
             ['enable_extensions==1', {
               'dependencies': [
                 '<(DEPTH)/extensions/components/extensions_components.gyp:native_app_window',
               ],
@@ skipping 274 matching lines @@
           ],
           'sources': [
             '<@(chrome_browser_ui_non_mobile_sources)',
             '<@(chrome_browser_ui_omnibox_non_mobile_sources)',
           ],
         }],
       ],
     },
   ],
 }