[Extensions] Remove ExtensionWebUI

chrome/browser/extensions/tab_helper.cc

Index: chrome/browser/extensions/tab_helper.cc
diff --git a/chrome/browser/extensions/tab_helper.cc b/chrome/browser/extensions/tab_helper.cc
index db27af954d9d819fc70925105e29c416e54434bb..a3d9fc73e995e743473d8418c3c870a17e50e1de 100644
--- a/chrome/browser/extensions/tab_helper.cc
+++ b/chrome/browser/extensions/tab_helper.cc
@@ -10,6 +10,7 @@
 #include "build/build_config.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/activity_log/activity_log.h"
+#include "chrome/browser/extensions/api/bookmark_manager_private/bookmark_manager_private_api.h"
 #include "chrome/browser/extensions/api/declarative_content/chrome_content_rules_registry.h"
 #include "chrome/browser/extensions/api/extension_action/extension_action_api.h"
 #include "chrome/browser/extensions/bookmark_app_helper.h"
@@ -184,6 +185,9 @@ TabHelper::TabHelper(content::WebContents* web_contents)
   ExtensionWebContentsObserver::GetForWebContents(web_contents)->dispatcher()->
       set_delegate(this);
 
+  BookmarkManagerPrivateDragEventRouter::MaybeCreateForWebContents(
+      web_contents);
+
   registrar_.Add(this,
                  content::NOTIFICATION_LOAD_STOP,
                  content::Source<NavigationController>(