Revert some old debugging code for tracking down a (now-closed) crash bug.

chrome/browser/extensions/extension_host.h

Index: chrome/browser/extensions/extension_host.h
diff --git a/chrome/browser/extensions/extension_host.h b/chrome/browser/extensions/extension_host.h
index bb96c5de4fdf520cbffcd6f162302627cbbed546..d121145ca2f50ddbb3db9f45399e10e343abd054 100644
--- a/chrome/browser/extensions/extension_host.h
+++ b/chrome/browser/extensions/extension_host.h
@@ -6,7 +6,6 @@
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_HOST_H_
 #pragma once
 
-#include <list>
 #include <string>
 #include <vector>
 
@@ -48,9 +47,6 @@ class ExtensionHost : public RenderViewHostDelegate,
   // Enable DOM automation in created render view hosts.
   static void EnableDOMAutomation() { enable_dom_automation_ = true; }
 
-  typedef std::list<ExtensionHost*> HostPointerList;
-  static HostPointerList* recently_deleted();
-
   ExtensionHost(const Extension* extension, SiteInstance* site_instance,
                 const GURL& url, ViewType::Type host_type);
   ~ExtensionHost();