Revert 244407 "InstantExtended: remove dead code related to the ..."

trunk/src/chrome/browser/ui/search/instant_page.cc

Index: trunk/src/chrome/browser/ui/search/instant_page.cc
===================================================================
--- trunk/src/chrome/browser/ui/search/instant_page.cc	(revision 244428)
+++ trunk/src/chrome/browser/ui/search/instant_page.cc	(working copy)
@@ -80,6 +80,28 @@
     delegate_->InstantPageAboutToNavigateMainFrame(contents(), url);
 }
 
+void InstantPage::DidNavigateMainFrame(
+    const content::LoadCommittedDetails& details,
+    const content::FrameNavigateParams& /* params */) {
+  // A 204 can be sent by the search provider as a lightweight signal
+  // to fall back to the local page, and we obviously want to fall back
+  // if we get any response code that indicates an error.
+  if (details.http_status_code == 204 || details.http_status_code >= 400)
+    delegate_->InstantPageLoadFailed(contents());
+}
+
+void InstantPage::DidFailProvisionalLoad(
+    int64 /* frame_id */,
+    const base::string16& frame_unique_name,
+    bool is_main_frame,
+    const GURL& /* validated_url */,
+    int /* error_code */,
+    const base::string16& /* error_description */,
+    content::RenderViewHost* /* render_view_host */) {
+  if (is_main_frame)
+    delegate_->InstantPageLoadFailed(contents());
+}
+
 void InstantPage::ModelChanged(const SearchModel::State& old_state,
                                const SearchModel::State& new_state) {
   if (old_state.instant_support != new_state.instant_support)