Update existing uses of /wd4267 to use the GN config

ui/views/examples/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/ui.gni")
 
 component("views_examples_lib") {
   testonly = true
 
   sources = [
@@ skipping 43 matching lines @@
     "textfield_example.h",
     "throbber_example.cc",
     "throbber_example.h",
     "tree_view_example.cc",
     "tree_view_example.h",
     "views_examples_export.h",
     "widget_example.cc",
     "widget_example.h",
   ]
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   defines = [ "VIEWS_EXAMPLES_IMPLEMENTATION" ]
 
   deps = [
     "//base",
     "//skia",
     "//third_party/icu",
     "//ui/base",
     "//ui/events",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/resources",
     "//ui/resources:ui_test_pak",
     "//ui/views",
   ]
 
   if (is_win) {
     deps += [ "//third_party/wtl" ]
-
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
   }
 
   if (use_aura) {
     deps += [ "//ui/aura" ]
   }
 }
 
 if (!is_win || link_chrome_on_windows) {
   executable("views_examples_exe") {
     testonly = true
@@ skipping 64 matching lines @@
     "//base",
     "//content",
     "//ui/views_content_client",
   ]
 
   if (is_win) {
     configs += [ "//build/config/win:windowed" ]
     configs -= [ "//build/config/win:console" ]
   }
 }