Fix the Mac GN build.

chrome/browser/ui/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/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 
 gypi_values = exec_script(
     "//build/gypi_to_gn.py",
@@ skipping 223 matching lines @@
       "//ash/resources",
       "//ui/aura",
       "//ui/keyboard",
       "//ui/keyboard:resources",
       "//ui/wm",
     ]
     if (!is_chromeos) {
       sources += rebase_path(gypi_values.chrome_browser_ui_aura_non_chromeos,
                              ".", "//chrome")
     }
-  } else {  # Non-Aura.
-    sources += rebase_path(gypi_values.chrome_browser_ui_non_aura_sources,
-                           ".", "//chrome")
   }
   if (ui_compositor_image_transport) {
     deps += [ "//ui/gl" ]
   }
   if (use_nss_certs) {
     sources += rebase_path(gypi_values.chrome_browser_ui_nss_sources,
                            ".", "//chrome")
   }
   if (!enable_themes) {
     sources -= [ "webui/theme_source.cc" ]
@@ skipping 157 matching lines @@
     script = "//chrome/tools/build/mac/generate_localizer"
     sources = [ ]
     table_path = "$target_gen_dir/ui_localizer_table.h"
     outputs = [ table_path ]
     args = [ rebase_path(table_path, root_build_dir) ] +
              rebase_path(nib_gypi_values.mac_translated_xibs,
                          root_build_dir,
                          "//chrome")
   }
 }