Revert "Allow declarative webrequest and webrequest in extensions."

extensions/browser/api/extensions_api_client.cc

Index: extensions/browser/api/extensions_api_client.cc
diff --git a/extensions/browser/api/extensions_api_client.cc b/extensions/browser/api/extensions_api_client.cc
index 09faa2d6f75dcb2288152f22de91f99391202c74..2c3de1513d0b704cc88866d2918091752a105ed7 100644
--- a/extensions/browser/api/extensions_api_client.cc
+++ b/extensions/browser/api/extensions_api_client.cc
@@ -55,6 +55,13 @@ WebViewPermissionHelperDelegate* ExtensionsAPIClient::
   return new WebViewPermissionHelperDelegate(web_view_permission_helper);
 }
 
+scoped_refptr<RulesRegistry> ExtensionsAPIClient::GetRulesRegistry(
+    content::BrowserContext* browser_context,
+    const RulesRegistry::WebViewKey& webview_key,
+    const std::string& event_name) {
+  return scoped_refptr<RulesRegistry>();
+}
+
 WebRequestEventRouterDelegate*
 ExtensionsAPIClient::CreateWebRequestEventRouterDelegate() const {
   return NULL;