Handle interface to prerenders.

chrome/browser/predictors/autocomplete_action_predictor.h

Index: chrome/browser/predictors/autocomplete_action_predictor.h
diff --git a/chrome/browser/predictors/autocomplete_action_predictor.h b/chrome/browser/predictors/autocomplete_action_predictor.h
index 3477241fece9baf1bc41241bdfa9f4ef3af0977e..0e73933289cee276e156230fd77651df26fd597e 100644
--- a/chrome/browser/predictors/autocomplete_action_predictor.h
+++ b/chrome/browser/predictors/autocomplete_action_predictor.h
@@ -14,6 +14,7 @@
 #include "base/string16.h"
 #include "chrome/browser/history/history_types.h"
 #include "chrome/browser/predictors/autocomplete_action_predictor_table.h"
+#include "chrome/browser/prerender/prerender_handle.h"
 #include "chrome/browser/profiles/profile_keyed_service.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
@@ -26,6 +27,10 @@ class HistoryService;
 class PredictorsHandler;
 class Profile;
 
+namespace content {
+class SessionStorageNamespace;
+}
+
 namespace history {
 class URLDatabase;
 }
@@ -79,6 +84,10 @@ class AutocompleteActionPredictor
   Action RecommendAction(const string16& user_text,
                          const AutocompleteMatch& match) const;
 
+  prerender::PrerenderHandle StartPrerendering(
+      const GURL& url,
+      content::SessionStorageNamespace* session_storage_namespace);
+
   // Return true if the suggestion type warrants a TCP/IP preconnection.
   // i.e., it is now quite likely that the user will select the related domain.
   static bool IsPreconnectable(const AutocompleteMatch& match);
@@ -199,6 +208,8 @@ class AutocompleteActionPredictor
   // This is cleared after every Omnibox navigation.
   std::vector<TransitionalMatch> transitional_matches_;
 
+  prerender::PrerenderHandle prerender_;
+
   // This allows us to predict the effect of confidence threshold changes on
   // accuracy.  This is cleared after every omnibox navigation.
   mutable std::vector<std::pair<GURL, double> > tracked_urls_;