Move the Ash NPAPI plugin blocker logic

chrome/browser/plugins/plugin_observer.h

Index: chrome/browser/plugins/plugin_observer.h
===================================================================
--- chrome/browser/plugins/plugin_observer.h	(revision 233357)
+++ chrome/browser/plugins/plugin_observer.h	(working copy)
@@ -34,11 +34,11 @@
   virtual ~PluginObserver();
 
   // content::WebContentsObserver implementation.
+  virtual void RenderViewCreated(
+      content::RenderViewHost* render_view_host) OVERRIDE;
   virtual void PluginCrashed(const base::FilePath& plugin_path,
                              base::ProcessId plugin_pid) OVERRIDE;
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
-  virtual void AboutToNavigateRenderView(
-      content::RenderViewHost* render_view_host) OVERRIDE;
 
  private:
   explicit PluginObserver(content::WebContents* web_contents);