Update existing uses of /wd4267 to use the GN config

ui/views/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/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 
 gypi_values = exec_script("//build/gypi_to_gn.py",
                           [ rebase_path("views.gyp") ],
                           "scope",
                           [ "views.gyp" ])
 
 component("views") {
   sources = gypi_values.views_sources
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   defines = [ "VIEWS_IMPLEMENTATION" ]
 
   deps = [
     "//base:i18n",
     "//base/third_party/dynamic_annotations",
     "//skia",
     "//third_party/icu",
     "//ui/accessibility",
     "//ui/aura",
     "//ui/native_theme",
@@ skipping 33 matching lines @@
 
   if (is_chromeos) {
     sources -= [
       "linux_ui/status_icon_linux.cc",
       "linux_ui/status_icon_linux.h",
     ]
   }
 
   if (is_win) {
     sources += gypi_values.views_win_sources
-    cflags = [ "/wd4267" ]  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     libs = [
       "imm32.lib",
       "oleacc.lib",
     ]
     ldflags = [ "/DELAYLOAD:user32.dll" ]
     deps += [
       "//third_party/iaccessible2",
       "//third_party/wtl",
     ]
   }
@@ skipping 197 matching lines @@
       "//testing/gtest",
       "//ui/aura",
       "//ui/compositor",
       "//ui/resources",
       "//ui/resources:ui_test_pak",
       "//ui/strings",
       "//ui/wm",
     ]
   }
 }