Use process per site instance for "Instant".

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 f7630a5978bacc58f8156c4c854cdbf710f39ba8..1ec7f8bd62f2033ba89b720018a7d32e0474ac73 100644
--- a/chrome/browser/search/search.h
+++ b/chrome/browser/search/search.h
@@ -75,6 +75,9 @@ string16 GetSearchTerms(const content::WebContents* contents);
 // Returns true if |url| should be rendered in the Instant renderer process.
 bool ShouldAssignURLToInstantRenderer(const GURL& url, Profile* profile);
 
+// Returns true if the Instant |url| should use process per site.
+bool ShouldInstantURLUseProcessPerSite(const GURL& url, Profile* profile);

[samarth, 2013/07/23 23:44:02]

How about ShouldUseProcessPerSiteForInstantURL instead?

[kmadhusu, 2013/07/24 00:36:02]

Done.

+
 // 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