base::Bind: More converts, mostly in WebUI.

chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h

Index: chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h
diff --git a/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h b/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h
index 3539b1414dfe28216b9e0da5a779a3022cd93ab2..2e4ffb34fd7c216a2ad901f8a880673b2f59fc7a 100644
--- a/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h
+++ b/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h
@@ -9,6 +9,7 @@
 #include <string>
 
 #include "base/memory/ref_counted.h"
+#include "base/memory/weak_ptr.h"
 #include "base/task.h"
 #include "chrome/browser/browsing_data_remover.h"
 #include "chrome/browser/chromeos/login/help_app_launcher.h"
@@ -173,6 +174,7 @@ class SigninScreenHandler : public BaseScreenHandler,
   void StartClearingCookies();
 
   // Kick off DNS cache flushing.
+  void ClearDnsCache(const base::Closure& callback, IOThread* io_thread);
   void StartClearingDnsCache();
   void OnDnsCleared();
 
@@ -200,7 +202,7 @@ class SigninScreenHandler : public BaseScreenHandler,
   // Help application used for help dialogs.
   scoped_refptr<HelpAppLauncher> help_app_;
 
-  // Network state infromer used to keep offline message screen up.
+  // Network state informer used to keep offline message screen up.
   scoped_ptr<NetworkStateInformer> network_state_informer_;
 
   // Email to pre-populate with.
@@ -212,7 +214,7 @@ class SigninScreenHandler : public BaseScreenHandler,
 
   BrowsingDataRemover* cookie_remover_;
 
-  ScopedRunnableMethodFactory<SigninScreenHandler> method_factory_;
+  base::WeakPtrFactory<SigninScreenHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SigninScreenHandler);
 };