Replace the cookie monster on navigations instead of reusing it.

chrome/browser/tab_contents/tab_specific_content_settings.cc

Index: chrome/browser/tab_contents/tab_specific_content_settings.cc
diff --git a/chrome/browser/tab_contents/tab_specific_content_settings.cc b/chrome/browser/tab_contents/tab_specific_content_settings.cc
index cf94bba3d24fc42803cbf53709d34fa51fe200ac..545c6af70c407a78197fe347753950cfe1772ae3 100644
--- a/chrome/browser/tab_contents/tab_specific_content_settings.cc
+++ b/chrome/browser/tab_contents/tab_specific_content_settings.cc
@@ -301,9 +301,7 @@ TabSpecificContentSettings::LocalSharedObjectsContainer::
 }
 
 void TabSpecificContentSettings::LocalSharedObjectsContainer::Reset() {
-  cookies_->ValidateMap(prerender::PrerenderManager::GetMode());
-  cookies_->DeleteAll(false);
-  cookies_->ValidateMap(prerender::PrerenderManager::GetMode());
+  cookies_ = new net::CookieMonster(NULL, NULL);
   appcaches_->Reset();
   databases_->Reset();
   indexed_dbs_->Reset();