Fix ON_DEMAND_RENDER mode on Mac OSX....

plugin/mac/o3d_layer.mm

 /*
  * 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 78 matching lines @@
     created_context_ = false;
   }
 
   if (was_resized_) {
     obj_->Resize(width_, height_);
     was_resized_ = false;
   }
 
 
   if (obj_) {
-    obj_->client()->Tick();
     obj_->client()->RenderClient(true);
   }
 
   // Call super to finalize the drawing. By default it just calls glFlush().
   [super drawInCGLContext:ctx pixelFormat:pf forLayerTime:t displayTime:ts];
 }
 
 - (BOOL)canDrawInCGLContext:(CGLContextObj)ctx
                 pixelFormat:(CGLPixelFormatObj)pf
                forLayerTime:(CFTimeInterval)t
@@ skipping 78 matching lines @@
   return glContext_;
 }
 
 - (void)setWidth:(int)width height:(int)height {
   width_ = width;
   height_ = height;
   was_resized_ = true;
 }
 
 @end