Tell DNS prefetch when search URL is likely so that prewarming can be done...

chrome/browser/net/dns_global.h

Index: chrome/browser/net/dns_global.h
===================================================================
--- chrome/browser/net/dns_global.h	(revision 43988)
+++ chrome/browser/net/dns_global.h	(working copy)
@@ -42,10 +42,15 @@
 void EnableDnsPrefetch(bool enable);
 void RegisterPrefs(PrefService* local_state);
 void RegisterUserPrefs(PrefService* user_prefs);
+
 // Renderer bundles up list and sends to this browser API via IPC.
 void DnsPrefetchList(const NameList& hostnames);
+
 // This API is used by the autocomplete popup box (as user types).
-void DnsPrefetchUrl(const GURL& url);
+// Search URL's may be "prewarmed" above and beyond the DNS resolution.
+void DnsPrefetchUrl(const GURL& url, bool is_search_url);
+
+// When displaying info in about:dns, the following API is called.
 void DnsPrefetchGetHtmlInfo(std::string* output);
 
 //------------------------------------------------------------------------------