Aura/GTK integration: Create a small stub library that can talk to GTK.

chrome/chrome_browser.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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
@@ skipping 4395 matching lines @@
             'browser/password_manager/native_backend_gnome_x.h',
           ],
         }],
         ['use_ash==1', {
           'dependencies': [
             '../ash/ash.gyp:ash',
             '../ash/ash_strings.gyp:ash_strings',
             '../ui/app_list/app_list.gyp:app_list',
           ],
         }],
+        ['use_aura==1 and use_ash==0 and OS=="linux"', {
+          'dependencies': [
+            # gtk2 is the only component that can interact with gtk2 in our new
+            # world.
+            'browser/ui/libgtk2ui/libgtk2ui.gyp:gtk2ui',
+          ],
+        }],
         ['use_aura==1', {
           'sources/': [
             ['exclude', '^browser/automation/automation_provider_win.cc'],
             ['exclude', '^browser/automation/chrome_frame_automation_provider.cc'],
             ['exclude', '^browser/automation/chrome_frame_automation_provider.h'],
             ['exclude', '^browser/automation/testing_automation_provider_win.cc'],
             ['exclude', '^browser/external_tab/external_tab_container_win.cc'],
             ['exclude', '^browser/external_tab/external_tab_container_win.h'],
             ['exclude', '^browser/first_run/try_chrome_dialog_view.cc'],
             ['exclude', '^browser/first_run/try_chrome_dialog_view.h'],
@@ skipping 750 matching lines @@
         'browser/metrics/proto/study.proto',
       ],
       'variables': {
         'proto_in_dir': 'browser/metrics/proto',
         'proto_out_dir': 'chrome/browser/metrics/proto',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],
 }