Remove prerender sessionStorage namespace merging (1/2)

chrome/browser/prerender/prerender_field_trial.cc

Index: chrome/browser/prerender/prerender_field_trial.cc
diff --git a/chrome/browser/prerender/prerender_field_trial.cc b/chrome/browser/prerender/prerender_field_trial.cc
index d50558262f9491b53ca5ce26c69b8993a1cab495..aad5827a8b9053ad309d56d0efaa1f89b9bb5f84 100644
--- a/chrome/browser/prerender/prerender_field_trial.cc
+++ b/chrome/browser/prerender/prerender_field_trial.cc
@@ -80,8 +80,6 @@ const int kDefaultPrefetchListTimeoutSeconds = 300;
 const char kSkipPrerenderLocalCanadidates[] = "SkipPrerenderLocalCandidates";
 const char kSkipPrerenderServiceCanadidates[] =
     "SkipPrerenderServiceCandidates";
-const char kDisableSessionStorageNamespaceMerging[] =
-    "DisableSessionStorageNamespaceMerging";
 const char kPrerenderCookieStore[] = "PrerenderCookieStore";
 
 void SetupPrerenderFieldTrial() {
@@ -480,11 +478,6 @@ bool SkipLocalPredictorServiceCandidates() {
       kEnabledGroup;
 }
 
-bool ShouldMergeSessionStorageNamespaces() {
-  return GetLocalPredictorSpecValue(kDisableSessionStorageNamespaceMerging) !=
-      kDisabledGroup;
-}
-
 bool IsPrerenderCookieStoreEnabled() {
   return GetLocalPredictorSpecValue(kPrerenderCookieStore) != kDisabledGroup &&
       FieldTrialList::FindFullName(kPrerenderCookieStore) != kDisabledGroup;