linux/gyp: Find missing symbols at build time, not runtime.

chrome/browser/ui/libgtk2ui/libgtk2ui.gyp

 # 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': {
     'chromium_code': 1,
   },
   'targets': [
     {
       # GN version: //chrome/browser/ui/libgtk2ui
       'target_name': 'gtk2ui',
       'type': '<(component)',
       'dependencies': [
         '../../../../base/base.gyp:base',
         '../../../../base/base.gyp:base_i18n',
         '../../../../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
         '../../../../build/linux/system.gyp:gconf',
         '../../../../build/linux/system.gyp:gtk',
         '../../../../build/linux/system.gyp:gtkprint',
+        '../../../../build/linux/system.gyp:x11',
         '../../../../components/components_resources.gyp:components_resources',
+        '../../../../content/content.gyp:content',
         '../../../../printing/printing.gyp:cups',
+        '../../../../printing/printing.gyp:printing',
         '../../../../skia/skia.gyp:skia',
+        '../../../../ui/aura/aura.gyp:aura',
         '../../../../ui/base/ui_base.gyp:ui_base',
+        '../../../../ui/events/events.gyp:events',
+        '../../../../ui/events/events.gyp:events_base',
+        '../../../../ui/gfx/gfx.gyp:gfx',
+        '../../../../ui/gfx/x/gfx_x11.gyp:gfx_x11',
+        '../../../../ui/native_theme/native_theme.gyp:native_theme',
         '../../../../ui/resources/ui_resources.gyp:ui_resources',
+        '../../../../ui/shell_dialogs/shell_dialogs.gyp:shell_dialogs',
         '../../../../ui/strings/ui_strings.gyp:ui_strings',
         '../../../../ui/views/views.gyp:views',
         '../../../chrome_resources.gyp:chrome_extra_resources',
         '../../../chrome_resources.gyp:chrome_resources',
         '../../../chrome_resources.gyp:chrome_strings',
         '../../../chrome_resources.gyp:theme_resources',
       ],
       'defines': [
         'LIBGTK2UI_IMPLEMENTATION',
       ],
@@ skipping 66 matching lines @@
             '-Wno-unused-function',
 
             # G_STATIC_ASSERT uses a typedef as a static_assert.
             '-Wno-unused-local-typedef',
           ],
         }],
       ],
     },
   ],
 }