Instant: Use only one hidden WebContents per profile.

chrome/browser/prefs/browser_prefs.cc

Index: chrome/browser/prefs/browser_prefs.cc
diff --git a/chrome/browser/prefs/browser_prefs.cc b/chrome/browser/prefs/browser_prefs.cc
index b8c81a8666683efb9cbf334293318c0f882d49b6..eae60c8555054fbb1164c56bb85f80dfb4a5c2c0 100644
--- a/chrome/browser/prefs/browser_prefs.cc
+++ b/chrome/browser/prefs/browser_prefs.cc
@@ -72,10 +72,10 @@
 #include "chrome/browser/ui/alternate_error_tab_observer.h"
 #include "chrome/browser/ui/app_list/app_list_service.h"
 #include "chrome/browser/ui/autofill/autofill_dialog_controller_impl.h"
-#include "chrome/browser/ui/browser_instant_controller.h"
 #include "chrome/browser/ui/browser_ui_prefs.h"
 #include "chrome/browser/ui/network_profile_bubble.h"
 #include "chrome/browser/ui/prefs/prefs_tab_helper.h"
+#include "chrome/browser/ui/search/search.h"
 #include "chrome/browser/ui/search_engines/keyword_editor_controller.h"
 #include "chrome/browser/ui/startup/autolaunch_prompt.h"
 #include "chrome/browser/ui/tabs/pinned_tab_codec.h"
@@ -266,8 +266,8 @@ void RegisterUserPrefs(PrefService* user_prefs,
   AutofillManager::RegisterUserPrefs(registry);
   BookmarkPromptPrefs::RegisterUserPrefs(registry);
   bookmark_utils::RegisterUserPrefs(registry);
-  BrowserInstantController::RegisterUserPrefs(user_prefs, registry);
   browser_sync::SyncPrefs::RegisterUserPrefs(registry);
+  chrome::search::RegisterUserPrefs(registry);
   ChromeContentBrowserClient::RegisterUserPrefs(registry);
   ChromeDownloadManagerDelegate::RegisterUserPrefs(registry);
   ChromeVersionService::RegisterUserPrefs(registry);