O3D Mac: Add CoreAnimation support

plugin/cross/o3d_glue.h

 /*
  * 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 257 matching lines @@
   void* mac_window_selected_tab_;
   bool mac_surface_hidden_;
   // end of Safari tab detection vars
   GLint last_buffer_rect_[4];
   Point last_plugin_loc_;
   // can be a CGrafPtr, a CGContextRef or NULL depending on drawing_model
   void* mac_2d_context_;
   // either can be NULL depending on drawing_model
   AGLContext mac_agl_context_;
   CGLContextObj mac_cgl_context_;
+  void *gl_layer_;
   // If in Chrome, we actually do all of our rendering offscreen, and
   // bootstrap off a 1x1 pbuffer
   CGLPBufferObj mac_cgl_pbuffer_;
 
   // Fullscreen related stuff.
 
 #ifdef O3D_PLUGIN_ENABLE_FULLSCREEN_MSG
   // FullscreenIdle gets repeatedly called while we are in fullscreen mode.
   // Currently its only task is to hide the fullscreen message at the right
   // time.
@@ skipping 246 matching lines @@
 
   bool AllocateOffscreenRenderSurfaces(int width, int height);
   void DeallocateOffscreenRenderSurfaces();
 };
 
 }  // namespace o3d
 }  // namespace glue
 
 
 #endif  // O3D_PLUGIN_CROSS_O3D_GLUE_H_