MacViews: Fix GN build

ui/gfx/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")
 import("//testing/test.gni")
 
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
@@ skipping 309 matching lines @@
     ]
   }
 
   # Linux.
   if (is_linux) {
     configs += [ "//build/config/linux:fontconfig" ]
   }
 
   if (!use_aura) {
     sources -= [
-      "nine_image_painter.cc",
-      "nine_image_painter.h",
       "path_aura.cc",
       "screen_aura.cc",
     ]
+    if (!toolkit_views) {
+      sources -= [
+        "nine_image_painter.cc",
+        "nine_image_painter.h",
+      ]
+    }
   }
 
   if (use_x11) {
     deps += [ "//ui/gfx/x" ]
     configs += [ "//build/config/linux:x11" ]
   } else {
     sources -= [ "path_x11.cc" ]
   }
 
   if (use_cairo) {
@@ skipping 179 matching lines @@
 if (is_android) {
   generate_jni("gfx_jni_headers") {
     sources = [
       "../android/java/src/org/chromium/ui/gfx/BitmapHelper.java",
       "../android/java/src/org/chromium/ui/gfx/DeviceDisplayInfo.java",
       "../android/java/src/org/chromium/ui/gfx/ViewConfigurationHelper.java",
     ]
     jni_package = "gfx"
   }
 }