renderer: implement multiple permission requesting

content/child/permissions/permission_dispatcher_thread_proxy.h

Index: content/child/permissions/permission_dispatcher_thread_proxy.h
diff --git a/content/child/permissions/permission_dispatcher_thread_proxy.h b/content/child/permissions/permission_dispatcher_thread_proxy.h
index 125e5246671304d2eb520cc6b58ffd828e7e77f6..d29036764d3faeeb167bfd910e4569bdb302693c 100644
--- a/content/child/permissions/permission_dispatcher_thread_proxy.h
+++ b/content/child/permissions/permission_dispatcher_thread_proxy.h
@@ -39,6 +39,10 @@ class PermissionDispatcherThreadProxy :
   virtual void requestPermission(blink::WebPermissionType type,
                                  const blink::WebURL& origin,
                                  blink::WebPermissionCallback* callback);
+  virtual void requestPermissions(
+      const blink::WebVector<blink::WebPermissionType>& types,
+      const blink::WebURL& origin,
+      blink::WebPermissionsCallback* callback);
   virtual void revokePermission(blink::WebPermissionType type,
                                 const blink::WebURL& origin,
                                 blink::WebPermissionCallback* callback);