Fix for GL unit_tests....

core/cross/gl/renderer_gl.cc

 /*
  * Copyright 2009, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 804 matching lines @@
   // and context here.
   HINSTANCE module_handle;
   if (!::GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT |
                            GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS,
                            reinterpret_cast<wchar_t*>(IntermediateWindowProc),
                            &module_handle)) {
     return Renderer::INITIALIZATION_ERROR;
   }
 
   WNDCLASS intermediate_class;
-  intermediate_class.style = CS_HREDRAW | CS_VREDRAW;
+  intermediate_class.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
   intermediate_class.lpfnWndProc = IntermediateWindowProc;
   intermediate_class.cbClsExtra = 0;
   intermediate_class.cbWndExtra = 0;
   intermediate_class.hInstance = module_handle;
   intermediate_class.hIcon = LoadIcon(NULL, IDI_APPLICATION);
   intermediate_class.hCursor = LoadCursor(NULL, IDC_ARROW);
   intermediate_class.hbrBackground = NULL;
   intermediate_class.lpszMenuName = NULL;
   intermediate_class.lpszClassName = L"Intermediate GL Window";
 
@@ skipping 714 matching lines @@
   return swizzle_table;
 }
 
 // This is a factory function for creating Renderer objects.  Since
 // we're implementing GL, we only ever return a GL renderer.
 Renderer* Renderer::CreateDefaultRenderer(ServiceLocator* service_locator) {
   return RendererGL::CreateDefault(service_locator);
 }
 
 }  // namespace o3d