Blacklist the O3D plugin on the Mac

webkit/glue/plugins/plugin_list_mac.mm

Index: webkit/glue/plugins/plugin_list_mac.mm
diff --git a/webkit/glue/plugins/plugin_list_mac.mm b/webkit/glue/plugins/plugin_list_mac.mm
index 3bb23f139e1704a47bcb1e6989e9bb6b1aa540e7..f37f4413e42c61559384e552eee41e45f0a90784 100644
--- a/webkit/glue/plugins/plugin_list_mac.mm
+++ b/webkit/glue/plugins/plugin_list_mac.mm
@@ -86,6 +86,8 @@ bool PluginList::ShouldLoadPlugin(const WebPluginInfo& info,
     "application/x-director",             // Crashes during initialization.
     "application/x-googlegears",          // Safari-specific.
     "application/x-vnd.movenetworks.qm",  // Crashes during initialization.
+    "application/vnd.o3d.auto",           // Doesn't render, and having it
+                                          // detected can prevent fallbacks.
   };
   // In the case of plugins that share MIME types, we have to blacklist by name.
   const char* blacklisted_plugin_names[] = {