Makes test_web_graphics_context_3d only compile if

use_webkit_compositor is set.

BUG=none
TEST=none
R=piman@chromium.org


Review URL: http://codereview.chromium.org/8774012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@112544 0039d316-1c4b-4281-b951-d872f2087c98

ui/gfx/compositor/compositor.gyp

@@ -107,6 +107,8 @@
             'sources!': [
               'compositor_cc.cc',
               'compositor_cc.h',
+              'test_web_graphics_context_3d.cc',
+              'test_web_graphics_context_3d.h',
             ],
           }
         ],