(Try 2) InstantExtended: remove dead code related to the non-cacheable NTP.

chrome/browser/ui/search/instant_controller.cc

Index: chrome/browser/ui/search/instant_controller.cc
diff --git a/chrome/browser/ui/search/instant_controller.cc b/chrome/browser/ui/search/instant_controller.cc
index dea6d08d7d7f9d9032f810244f5e913fdc5bc398..a5db87a215a9236b0ade202c85df7e32905499a0 100644
--- a/chrome/browser/ui/search/instant_controller.cc
+++ b/chrome/browser/ui/search/instant_controller.cc
@@ -117,29 +117,6 @@ void InstantController::SetSuggestionToPrefetch(
   }
 }
 
-void InstantController::InstantPageLoadFailed(content::WebContents* contents) {
-  DCHECK(IsContentsFrom(instant_tab(), contents));
-
-  // Verify we're not already on a local page and that the URL precisely
-  // equals the instant_url (minus the query params, as those will be filled
-  // in by template values).  This check is necessary to make sure we don't
-  // inadvertently redirect to the local NTP if someone, say, reloads a SRP
-  // while offline, as a committed results page still counts as an instant
-  // url.  We also check to make sure there's no forward history, as if
-  // someone hits the back button a lot when offline and returns to a NTP
-  // we don't want to redirect and nuke their forward history stack.
-  const GURL& current_url = contents->GetURL();
-  GURL instant_url = chrome::GetInstantURL(profile(),
-                                           chrome::kDisableStartMargin, false);
-  if (instant_tab_->IsLocal() ||
-      !search::MatchesOriginAndPath(instant_url, current_url) ||
-      !current_url.ref().empty() ||
-      contents->GetController().CanGoForward())
-    return;
-  LOG_INSTANT_DEBUG_EVENT(this, "InstantPageLoadFailed: instant_tab");
-  RedirectToLocalNTP(contents);
-}
-
 bool InstantController::SubmitQuery(const base::string16& search_terms) {
   if (instant_tab_ && instant_tab_->supports_instant() &&
       search_mode_.is_origin_search()) {
@@ -296,17 +273,6 @@ bool InstantController::IsInputInProgress() const {
       omnibox_focus_state_ == OMNIBOX_FOCUS_VISIBLE;
 }
 
-void InstantController::RedirectToLocalNTP(content::WebContents* contents) {
-  contents->GetController().LoadURL(
-      GURL(chrome::kChromeSearchLocalNtpUrl),
-      content::Referrer(),
-      content::PAGE_TRANSITION_SERVER_REDIRECT,
-      std::string());  // No extra headers.
-  // TODO(dcblack): Remove extraneous history entry caused by 404s.
-  // Note that the base case of a 204 being returned doesn't push a history
-  // entry.
-}
-
 InstantService* InstantController::GetInstantService() const {
   return InstantServiceFactory::GetForProfile(profile());
 }