Renderer initiated navigations from non instant process should not fall into instant.

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 105 matching lines @@
 // lead to an infinite recursion.
 bool IsInstantEnabled(Profile* profile);
 
 // Returns true if 'use_remote_ntp_on_startup' flag is enabled in field trials
 // to always show the remote NTP on browser startup.
 bool ShouldPreferRemoteNTPOnStartup();
 
 // Returns true if |my_url| matches |other_url|.
 bool MatchesOriginAndPath(const GURL& my_url, const GURL& other_url);
 
+// Transforms the input |url| into its "privileged URL". The returned URL
+// facilitates grouping process-per-site. The |url| is transformed, for
+// example, from
+//
+//   https://www.google.com/search?espv=1&q=tractors
+//
+// to the privileged URL
+//
+//   chrome-search://www.google.com/search?espv=1&q=tractors
+//
+// Notice the scheme change.
+//
+// If the input is already a privileged URL then that same URL is returned.
+GURL GetPrivilegedURLForInstant(const GURL& url, Profile* profile);
+
+// Returns true if the input |url| is a privileged Instant URL.
+bool IsPrivilegedURLForInstant(const GURL& url);
+
 // -----------------------------------------------------
 // The following APIs are exposed for use in tests only.
 // -----------------------------------------------------
 
 // Forces the Instant Extended API to be enabled for tests.
 void EnableInstantExtendedAPIForTesting();
 
 // Type for a collection of experiment configuration parameters.
 typedef std::vector<std::pair<std::string, std::string> > FieldTrialFlags;
 
@@ skipping 34 matching lines @@
                                        const TemplateURLRef& ref,
                                        int start_margin);
 
 // Returns whether the default search provider has a valid Instant URL in its
 // template. Exposed for testing only.
 bool DefaultSearchProviderSupportsInstant(Profile* profile);
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_SEARCH_SEARCH_H_