Address more TOOD(GYP) in GN build.

extensions/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.
 
 # TODO(rockot) bug 505926: Don't include chrome files from here.
 # See chrome_browser_tests_extensions_sources below
 import("//chrome/chrome_tests.gni")
 import("//extensions/extensions.gni")
 import("//testing/test.gni")
 import("//tools/grit/grit_rule.gni")
@@ skipping 233 matching lines @@
     "//mojo/edk/system",
     "//mojo/public/cpp/bindings",
     "//testing/gmock",
     "//testing/gtest",
   ]
 
   data_deps = [
     "//third_party/mesa:osmesa",
   ]
 
-  if (is_win) {
-    if (target_cpu == "x86") {
-      data_deps += [
-        # "$root_out_dir/wow_helper.exe"  # TODO(GYP)

[brettw, 2016/05/10 19:51:33]

This comes automatically because this target depends indirectly on the sandbox
via content.

-      ]
-    }
-  }
-
   if (is_mac) {
     deps += [ "shell:app_shell" ]  # Needed for App Shell.app's Helper.
   }
 }
 
 # TODO(rockot) bug 505926: These should be moved to extensions_browsertests but have
 # old dependencies on chrome files. The chrome dependencies should be removed
 # and these moved to the extensions_browsertests target. Currently, we solve
 # the problem by making this a source set and linking it into
 # //chrome/test:browser_tests.
@@ skipping 96 matching lines @@
     "//testing/gtest",
     "//third_party/hunspell",
     "//third_party/icu",
     "//third_party/libpng",
     "//third_party/zlib",
     "//ui/base:test_support",
     "//ui/resources:ui_test_pak",
     "//ui/web_dialogs:test_support",
   ]
 }