Remove oak windows and its flags.

ui/oak/oak.gyp

Index: ui/oak/oak.gyp
diff --git a/ui/oak/oak.gyp b/ui/oak/oak.gyp
deleted file mode 100644
index 750b3efa2f71a2c78379ba1a989464d32c5a8716..0000000000000000000000000000000000000000
--- a/ui/oak/oak.gyp
+++ /dev/null
@@ -1,49 +0,0 @@
-# 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': [
-    {
-      'target_name': 'oak',
-      'type': '<(component)',
-      'dependencies': [
-        '../../base/base.gyp:base',
-        '../../base/base.gyp:base_i18n',
-        '../../skia/skia.gyp:skia',
-        '../../url/url.gyp:url_lib',
-        '../aura/aura.gyp:aura',
-        '../compositor/compositor.gyp:compositor',
-        '../events/events.gyp:events',
-        '../gfx/gfx.gyp:gfx',
-        '../gfx/gfx.gyp:gfx_geometry',
-        '../resources/ui_resources.gyp:ui_resources',
-        '../ui.gyp:ui',
-        '../views/views.gyp:views',
-      ],
-      'defines': [
-        'OAK_IMPLEMENTATION',
-      ],
-      'sources': [
-        # All .cc, .h under oak, except unittests
-        'oak.h',
-        'oak_aura_window_display.cc',
-        'oak_aura_window_display.h',
-        'oak_export.h',
-        'oak_pretty_print.cc',
-        'oak_pretty_print.h',
-        'oak_tree_model.cc',
-        'oak_tree_model.h',
-        'oak_window.cc',
-        'oak_window.h',
-        'oak_details_model.h',
-      ],
-      # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-      'msvs_disabled_warnings': [ 4267, ],
-    },
-  ],
-}