Implement local NTP for fallback.

chrome/browser/instant/search.cc

Index: chrome/browser/instant/search.cc
diff --git a/chrome/browser/instant/search.cc b/chrome/browser/instant/search.cc
index 2816d5250fcd482487b0feb49968e12830d62cdf..9f491fecbae997ef890b7af0c282269afa4da26b 100644
--- a/chrome/browser/instant/search.cc
+++ b/chrome/browser/instant/search.cc
@@ -302,7 +302,8 @@ bool NavEntryIsInstantNTP(const content::WebContents* contents,
   Profile* profile = Profile::FromBrowserContext(contents->GetBrowserContext());
   return IsInstantExtendedAPIEnabled() &&
          IsRenderedInInstantProcess(contents, profile) &&
-         IsInstantURL(entry->GetVirtualURL(), profile) &&
+         (IsInstantURL(entry->GetVirtualURL(), profile) ||
+          entry->GetVirtualURL() == GURL(chrome::kChromeSearchLocalNTPURL)) &&

[samarth, 2013/03/15 22:14:29]

Please add a unit test for the changes in this file.

[jeremycho, 2013/03/16 00:09:56]

Done.

          GetSearchTermsImpl(contents, entry).empty();
 }
 
@@ -312,7 +313,8 @@ bool ShouldAssignURLToInstantRenderer(const GURL& url, Profile* profile) {
          (url.SchemeIs(chrome::kChromeSearchScheme) ||
           IsInstantURL(url, profile) ||
           (IsInstantExtendedAPIEnabled() &&
-           url == GURL(kLocalOmniboxPopupURL)));
+           (url == GURL(kLocalOmniboxPopupURL) ||
+            url == GURL(chrome::kChromeSearchLocalNTPURL))));
 }
 
 void RegisterUserPrefs(PrefRegistrySyncable* registry) {