Add GN support for midl.

content/browser/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("//content/browser/browser.gni")
 
 source_set("browser") {
   # Only targets in the content tree can depend directly on this target.
@@ skipping 164 matching lines @@
     sources -= [
       "device_sensors/data_fetcher_shared_memory_default.cc",
       "geolocation/empty_wifi_data_provider.cc",
     ]
     defines += [
       # This prevents the inclusion of atlhost.h which paired
       # with the windows 8 sdk it does the wrong thing.
       "__ATLHOST_H__",
     ]
     deps += [
-      # TODO(GYP)
-      #"//third_party/iaccessible2",
-      #"//third_party/isimpledom",
+      "//third_party/iaccessible2",
+      "//third_party/isimpledom",
     ]
     libs += [
       "comctl32.lib",
       "dinput8.lib",
       "dwmapi.lib",
       "dxguid.lib",
       "sensorsapi.lib",
       "portabledeviceguids.lib",
     ]
     # TODI(GYP)
@@ skipping 165 matching lines @@
       sources -= [
         "geolocation/empty_wifi_data_provider.cc",
       ]
       deps += [ "//dbus" ]
     } else {
       # This will already have gotten removed for all non-Linux cases.
        sources -= [ "geolocation/wifi_data_provider_linux.cc" ]
     }
   }
 }