browser: implement multiple permission requesting

content/shell/browser/layout_test/layout_test_permission_manager.h

Index: content/shell/browser/layout_test/layout_test_permission_manager.h
diff --git a/content/shell/browser/layout_test/layout_test_permission_manager.h b/content/shell/browser/layout_test/layout_test_permission_manager.h
index 85cd18048fe40a2b315a89fd1e18a254fcd26863..0e75f51619e31d7b8b048b1066c4769f2c03f363 100644
--- a/content/shell/browser/layout_test/layout_test_permission_manager.h
+++ b/content/shell/browser/layout_test/layout_test_permission_manager.h
@@ -27,10 +27,14 @@ class LayoutTestPermissionManager : public PermissionManager {
       const GURL& requesting_origin,
       bool user_gesture,
       const base::Callback<void(PermissionStatus)>& callback) override;
-  void CancelPermissionRequest(PermissionType permission,
-                               RenderFrameHost* render_frame_host,
-                               int request_id,
-                               const GURL& requesting_origin) override;
+  int RequestPermissions(
+      const std::vector<PermissionType>& permission,
+      RenderFrameHost* render_frame_host,
+      const GURL& requesting_origin,
+      bool user_gesture,
+      const base::Callback<void(
+          const std::vector<PermissionStatus>&)>& callback) override;
+  void CancelPermissionRequest(int request_id) override;
   void ResetPermission(PermissionType permission,
                        const GURL& requesting_origin,
                        const GURL& embedding_origin) override;