Fixed gles2 demo by switching it from a console application to a windowed one...

gpu/gpu.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,
     # This is defined here because we need to compile this set of files
     # twice with different defines. Once so it calls real GL, again so it
     # calls mock GL for the unit tests.
@@ skipping 382 matching lines @@
           {
             'target_name': 'gles2_demo',
             'type': 'executable',
             'dependencies': [
               'command_buffer_service',
               'gles2_demo_lib',
             ],
             'sources': [
               'command_buffer/client/gles2_demo.cc',
             ],
+            'msvs_settings': {
+              'VCLinkerTool': {
+                # 0 == not set
+                # 1 == /SUBSYSTEM:CONSOLE
+                # 2 == /SUBSYSTEM:WINDOWS
+               'SubSystem': '2',
+              },
+            },
           },
         ],
       },
     ],
   ],
 }
 
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