Introduce search::IsInstantNTPURL

chrome/browser/search/search.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_SEARCH_SEARCH_H_
 #define CHROME_BROWSER_SEARCH_SEARCH_H_
 
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 70 matching lines @@
 
 // Returns true if |contents| is rendered inside the Instant process for
 // |profile|.
 bool IsRenderedInInstantProcess(const content::WebContents* contents,
                                 Profile* profile);
 
 // Returns true if the Instant |url| should use process per site.
 bool ShouldUseProcessPerSiteForInstantURL(const GURL& url, Profile* profile);
 
 // Returns true if |url| corresponds to a New Tab page (it can be either an
-// Instant Extended NTP or a non-extended NTP).
+// Instant Extended NTP or a non-extended NTP). A page that matches the search
+// or Instant URL of the default search provider but does not have any search
+// terms is considered an Instant NTP.
+// TODO(treib): This is confusingly named, as it includes URLs that are related
+// to an NTP, but aren't an NTP themselves (such as the Instant URL, e.g.
+// https://www.google.com/webhp?espv=2).
 bool IsNTPURL(const GURL& url, Profile* profile);
 
 // Returns true if the visible entry of |contents| is a New Tab Page rendered
-// by Instant. A page that matches the search or Instant URL of the default
-// search provider but does not have any search terms is considered an Instant
-// New Tab Page.
+// by Instant.
 bool IsInstantNTP(const content::WebContents* contents);
 
 // Same as IsInstantNTP but uses |nav_entry| to determine the URL for the page
 // instead of using the visible entry.
 bool NavEntryIsInstantNTP(const content::WebContents* contents,
                           const content::NavigationEntry* nav_entry);
 
+// Returns true if |url| corresponds to a New Tab page that would get rendered
+// by Instant.
+bool IsInstantNTPURL(const GURL& url, Profile* profile);
+
 // Returns the Instant URL of the default search engine. Returns an empty GURL
 // if the engine doesn't have an Instant URL, or if it shouldn't be used (say
 // because it doesn't satisfy the requirements for extended mode or if Instant
 // is disabled through preferences). Callers must check that the returned URL is
 // valid before using it. |force_instant_results| forces a search page to update
 // results incrementally even if that is otherwise disabled by google.com
 // preferences.
 // NOTE: This method expands the default search engine's instant_url template,
 // so it shouldn't be called from SearchTermsData or other such code that would
 // lead to an infinite recursion.
@@ skipping 72 matching lines @@
 
 // Returns true if 'use_search_path_for_instant' flag is set to true in field
 // trials to use an '/search' path in an alternate Instant search base page URL
 // for prefetching search results. This allows experimentation of Instant
 // search.
 bool ShouldUseSearchPathForInstant();
 
 }  // namespace search
 
 #endif  // CHROME_BROWSER_SEARCH_SEARCH_H_