Use a placeholder instead of the default plugin for missing plug-ins on Mac and Linux.

chrome/renderer/blocked_plugin.h

Index: chrome/renderer/blocked_plugin.h
diff --git a/chrome/renderer/blocked_plugin.h b/chrome/renderer/blocked_plugin.h
index cf53ec7f547356cf2d32967c501e3f4c29000391..8ef157e36eafdc503a5a3ff815b069a521413e5a 100644
--- a/chrome/renderer/blocked_plugin.h
+++ b/chrome/renderer/blocked_plugin.h
@@ -29,10 +29,10 @@ class BlockedPlugin : public RenderViewObserver,
  public:
   BlockedPlugin(RenderView* render_view,
                 WebKit::WebFrame* frame,
-                const webkit::npapi::PluginGroup& info,
                 const WebKit::WebPluginParams& params,
                 const WebPreferences& settings,
                 int template_id,
+                const string16& name,
                 const string16& message,
                 bool is_blocked_for_prerendering,
                 bool allow_loading);