alternate ntp: toolbar background and separator animation

chrome/browser/ui/search/search_tab_helper.cc

Index: chrome/browser/ui/search/search_tab_helper.cc
diff --git a/chrome/browser/ui/search/search_tab_helper.cc b/chrome/browser/ui/search/search_tab_helper.cc
index efccd6fca51dba311b5c76f5803bbf6f049e3037..42c7dd5bd2fb343b092e2ccf628d019f508987d2 100644
--- a/chrome/browser/ui/search/search_tab_helper.cc
+++ b/chrome/browser/ui/search/search_tab_helper.cc
@@ -91,7 +91,7 @@ void SearchTabHelper::NavigateToPendingEntry(
   if (!is_search_enabled_)
     return;
 
-  UpdateModel(url);
+  UpdateModel(url, !web_contents()->GetController().IsInitialNavigation());
   FlushNTP(url);
 }
 
@@ -102,17 +102,18 @@ void SearchTabHelper::Observe(
   DCHECK_EQ(content::NOTIFICATION_NAV_ENTRY_COMMITTED, type);
   content::LoadCommittedDetails* committed_details =
       content::Details<content::LoadCommittedDetails>(details).ptr();
-  UpdateModel(committed_details->entry->GetURL());
+  UpdateModel(committed_details->entry->GetURL(),
+              web_contents()->GetController().IsInitialNavigation());
   FlushNTP(committed_details->entry->GetURL());
 }
 
-void SearchTabHelper::UpdateModel(const GURL& url) {
+void SearchTabHelper::UpdateModel(const GURL& url, bool animate) {
   Mode::Type type = Mode::MODE_DEFAULT;
   if (IsNTP(url))
     type = Mode::MODE_NTP;
   else if (google_util::IsInstantExtendedAPIGoogleSearchUrl(url.spec()))
     type = Mode::MODE_SEARCH;
-  model_.SetMode(Mode(type, true));
+  model_.SetMode(Mode(type, animate));
 }
 
 void SearchTabHelper::FlushNTP(const GURL& url) {