Added cubemap demo.

gpu/demos/demos.gyp

 # Copyright (c) 2009 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'includes': [
     '../../build/common.gypi',
@@ skipping 39 matching lines @@
       'type': 'executable',
       'dependencies': [
         'app_framework',
         '../../third_party/gles2_book/gles2_book.gyp:simple_texture_2d',
       ],
       'sources': [
         'simple_texture_2d/main.cc',
       ],
     },
     {
+      'target_name': 'simple_texture_cubemap',
+      'type': 'executable',
+      'dependencies': [
+        'app_framework',
+        '../../third_party/gles2_book/gles2_book.gyp:simple_texture_cubemap',
+      ],
+      'sources': [
+        'simple_texture_cubemap/main.cc',
+      ],
+    },
+    {
       'target_name': 'simple_vertex_shader',
       'type': 'executable',
       'dependencies': [
         'app_framework',
         '../../third_party/gles2_book/gles2_book.gyp:simple_vertex_shader',
       ],
       'sources': [
         'simple_vertex_shader/main.cc',
       ],
     },
   ]
 }
 
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