[Tests not passing yet] Remove prerender sessionStorage namespace merging.

chrome/browser/prerender/prerender_local_predictor.h

Index: chrome/browser/prerender/prerender_local_predictor.h
diff --git a/chrome/browser/prerender/prerender_local_predictor.h b/chrome/browser/prerender/prerender_local_predictor.h
index e0a5c340a7fa11f014bba73da5eea2cc9e341dde..3ba7194aed000cb9e30b9dd6433e43730acaa64b 100644
--- a/chrome/browser/prerender/prerender_local_predictor.h
+++ b/chrome/browser/prerender/prerender_local_predictor.h
@@ -16,7 +16,6 @@
 #include "base/timer/timer.h"
 #include "chrome/browser/history/visit_database.h"
 #include "components/history/core/browser/history_service_observer.h"
-#include "content/public/browser/session_storage_namespace.h"
 #include "net/url_request/url_fetcher_delegate.h"
 #include "url/gurl.h"
 
@@ -209,8 +208,6 @@ class PrerenderLocalPredictor : public history::HistoryServiceObserver,
       bool* hinting_timed_out,
       bool* hinting_url_lookup_timed_out,
       bool* candidate_url_lookup_timed_out);
-  void ProcessNamespaceMergeResult(
-      content::SessionStorageNamespace::MergeResult result);
   typedef std::map<net::URLFetcher*, CandidatePrerenderInfo*>
       OutstandingFetchers;
   OutstandingFetchers outstanding_prerender_service_requests_;