Fix aura surface build

 gtk, wayland and aura+x11 needs this, which can just be use_x11

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/7969029

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@102401 0039d316-1c4b-4281-b951-d872f2087c98

ui/gfx/surface/surface.gyp

@@ -9,7 +9,7 @@
 
   'target_defaults': {
     'conditions': [
-      ['toolkit_uses_gtk == 1 or use_wayland == 1', {
+      ['use_x11 == 1', {
         'include_dirs': [
           '<(DEPTH)/third_party/angle/include',
         ],