Make win_aura work without ash.

ui/views/views.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,
   },
 
   'target_defaults': {
     'conditions': [
@@ skipping 674 matching lines @@
           'dependencies': [
             '../../sandbox/sandbox.gyp:sandbox',
           ],
         }],
         ['use_aura==1', {
           'dependencies': [
             '../gfx/compositor/compositor.gyp:compositor',
             '../gfx/compositor/compositor.gyp:compositor_test_support',
           ],
         }],
+        ['OS=="win"', {
+          'sources/': [
+            # This is needed because the aura rule strips it from the default
+            # sources list.
+            ['include', '^../../content/app/startup_helper_win.cc'],
+          ],
+        }],
       ],
     },  # target_name: views_examples_lib
   ],
 }