update example

gyp/views.gyp

 # Views is the Skia windowing toolkit.
 # It provides:
 #  * A portable means of creating native windows.
 #  * Events.
 #  * Basic widgets and controls.
 
 {
   'targets': [
     {
       'target_name': 'views',
@@ skipping 59 matching lines @@
 
         # Windows
         '../src/views/win/SkOSWindow_win.cpp',
         '../src/views/win/skia_win.cpp',
 
       ],
       'sources!' : [
         '../src/views/SDL/SkOSWindow_SDL.cpp',
       ],
       'conditions': [
+        [ 'skia_gpu == 1', {
+          'include_dirs' : [
+            '../src/gpu',
+          ],
+        }],
         [ 'skia_os == "mac"', {
           'link_settings': {
             'libraries': [
               '$(SDKROOT)/System/Library/Frameworks/Cocoa.framework',
               '$(SDKROOT)/System/Library/Frameworks/Foundation.framework',
             ],
           },
         },{
           'sources!': [
             '../src/views/mac/SkOSWindow_Mac.mm',
@@ skipping 43 matching lines @@
         'include_dirs': [
           '../include/views',
         ],
       },
       'export_dependent_settings': [
         'xml.gyp:xml',
       ],
     },
   ],
 }