Add chrome-search: access from Instant overlay

chrome/browser/instant/instant_service.h

Index: chrome/browser/instant/instant_service.h
diff --git a/chrome/browser/instant/instant_service.h b/chrome/browser/instant/instant_service.h
index 9bf8f5d64851cf2b80807dab6090ba25e92f2824..3920102957d5f6980451f839ef3e112975415e65 100644
--- a/chrome/browser/instant/instant_service.h
+++ b/chrome/browser/instant/instant_service.h
@@ -13,11 +13,13 @@
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 
+class Profile;
+
 // Tracks render process host IDs that are associated with Instant.
 class InstantService : public ProfileKeyedService,
                        public content::NotificationObserver {
  public:
-  InstantService();
+  explicit InstantService(Profile* profile);
   virtual ~InstantService();
 
   // Add, remove, and query RenderProcessHost IDs that are associated with
@@ -40,6 +42,8 @@ class InstantService : public ProfileKeyedService,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
+  Profile* const profile_;
+
   // The process ids associated with Instant processes.
   std::set<int> process_ids_;