InstantExtended: remove dead code related to the non-cacheable NTP.

chrome/browser/search/search.h

Index: chrome/browser/search/search.h
diff --git a/chrome/browser/search/search.h b/chrome/browser/search/search.h
index f76635bc2926f303538fdb3d40f8e9b43177f88d..ec51732a226c78836df04f3961bea67b06129309 100644
--- a/chrome/browser/search/search.h
+++ b/chrome/browser/search/search.h
@@ -146,13 +146,6 @@ GURL GetLocalInstantURL(Profile* profile);
 // match.  See comments on ShouldHideTopMatch in autocomplete_result.h.
 bool ShouldHideTopVerbatimMatch();
 
-// Returns true if the cacheable NTP should be shown and false if not.
-// Exposed for testing.
-bool ShouldUseCacheableNTP();
-
-// Returns true if the Instant NTP should be shown and false if not.
-bool ShouldShowInstantNTP();
-
 // Returns when we should show a search button in the omnibox.  This may be any
 // of several values, some of which depend on whether the underlying state of
 // the page would normally be to perform search term replacement; see also
@@ -182,13 +175,6 @@ bool ShouldDisplayOriginChip();
 // and hence different processes.
 GURL GetEffectiveURLForInstant(const GURL& url, Profile* profile);
 
-// Returns the staleness timeout (in seconds) that should be used to refresh the
-// InstantLoader.
-int GetInstantLoaderStalenessTimeoutSec();
-
-// Returns true if |contents| corresponds to a preloaded instant extended NTP.
-bool IsPreloadedInstantExtendedNTP(const content::WebContents* contents);
-
 // Rewrites |url| if
 //   1. |url| is kChromeUINewTabURL,
 //   2. InstantExtended is enabled, and