Remove prerender sessionStorage namespace merging (1/2)

chrome/browser/prerender/prerender_local_predictor.cc

Index: chrome/browser/prerender/prerender_local_predictor.cc
diff --git a/chrome/browser/prerender/prerender_local_predictor.cc b/chrome/browser/prerender/prerender_local_predictor.cc
index 6b112c8679a863e0f3070530d073967a3356cc00..901cbcc7adf9de05d0acecdc15e62cd274a9255e 100644
--- a/chrome/browser/prerender/prerender_local_predictor.cc
+++ b/chrome/browser/prerender/prerender_local_predictor.cc
@@ -1524,53 +1524,8 @@ void PrerenderLocalPredictor::OnTabHelperURLSeen(
         RecordEvent(EVENT_TAB_HELPER_URL_SEEN_NAMESPACE_MATCH_ENTRY);
       if (browser_navigate_initiated)
         RecordEvent(EVENT_TAB_HELPER_URL_SEEN_NAMESPACE_MATCH_BROWSER_NAVIGATE);
-    } else {
-      SessionStorageNamespace* prerender_session_storage_namespace =
-          best_matched_prerender->prerender_handle->
-          GetSessionStorageNamespace();
-      if (!prerender_session_storage_namespace) {
-        RecordEvent(EVENT_TAB_HELPER_URL_SEEN_NAMESPACE_MISMATCH_NO_NAMESPACE);
-      } else {
-        RecordEvent(EVENT_TAB_HELPER_URL_SEEN_NAMESPACE_MISMATCH_MERGE_ISSUED);
-        prerender_session_storage_namespace->Merge(
-            false,
-            best_matched_prerender->prerender_handle->GetChildId(),
-            tab_session_storage_namespace,
-            base::Bind(&PrerenderLocalPredictor::ProcessNamespaceMergeResult,
-                       weak_factory_.GetWeakPtr()));
-      }
     }
   }
 }
 
-void PrerenderLocalPredictor::ProcessNamespaceMergeResult(
-    content::SessionStorageNamespace::MergeResult result) {
-  RecordEvent(EVENT_NAMESPACE_MISMATCH_MERGE_RESULT_RECEIVED);
-  switch (result) {
-    case content::SessionStorageNamespace::MERGE_RESULT_NAMESPACE_NOT_FOUND:
-      RecordEvent(EVENT_NAMESPACE_MISMATCH_MERGE_RESULT_NAMESPACE_NOT_FOUND);
-      break;
-    case content::SessionStorageNamespace::MERGE_RESULT_NAMESPACE_NOT_ALIAS:
-      RecordEvent(EVENT_NAMESPACE_MISMATCH_MERGE_RESULT_NAMESPACE_NOT_ALIAS);
-      break;
-    case content::SessionStorageNamespace::MERGE_RESULT_NOT_LOGGING:
-      RecordEvent(EVENT_NAMESPACE_MISMATCH_MERGE_RESULT_NOT_LOGGING);
-      break;
-    case content::SessionStorageNamespace::MERGE_RESULT_NO_TRANSACTIONS:
-      RecordEvent(EVENT_NAMESPACE_MISMATCH_MERGE_RESULT_NO_TRANSACTIONS);
-      break;
-    case content::SessionStorageNamespace::MERGE_RESULT_TOO_MANY_TRANSACTIONS:
-      RecordEvent(EVENT_NAMESPACE_MISMATCH_MERGE_RESULT_TOO_MANY_TRANSACTIONS);
-      break;
-    case content::SessionStorageNamespace::MERGE_RESULT_NOT_MERGEABLE:
-      RecordEvent(EVENT_NAMESPACE_MISMATCH_MERGE_RESULT_NOT_MERGEABLE);
-      break;
-    case content::SessionStorageNamespace::MERGE_RESULT_MERGEABLE:
-      RecordEvent(EVENT_NAMESPACE_MISMATCH_MERGE_RESULT_MERGEABLE);
-      break;
-    default:
-      NOTREACHED();
-  }
-}
-
 }  // namespace prerender