Fix ANGLE build

Removed this in r5889.
Review URL: https://codereview.appspot.com/6651051

git-svn-id: http://skia.googlecode.com/svn/trunk@5904 2bbb7eff-a529-9590-31e7-b0007b416f81

gyp/views.gyp

@@ -112,6 +112,11 @@
             '../src/views/win/skia_win.cpp',
           ],
         }],
+        [ 'skia_gpu == 1', {
+          'include_dirs': [
+            '../include/gpu',
+          ],
+        }],
       ],
       'direct_dependent_settings': {
         'include_dirs': [