diff -up chromium-77.0.3865.75/base/task/promise/dependent_list.h.base-gcc-no-alignas chromium-77.0.3865.75/base/task/promise/dependent_list.h
--- chromium-77.0.3865.75/base/task/promise/dependent_list.h.base-gcc-no-alignas	2019-09-13 21:45:51.873172347 +0200
+++ chromium-77.0.3865.75/base/task/promise/dependent_list.h	2019-09-13 21:46:21.661522514 +0200
@@ -59,7 +59,7 @@ class BASE_EXPORT DependentList {
 
   // Align Node on an 8-byte boundary to ensure the first 3 bits are 0 and can
   // be used to store additional state (see static_asserts below).
-  class BASE_EXPORT alignas(8) Node {
+  class BASE_EXPORT ALIGNAS(8) Node {
    public:
     Node();
     explicit Node(Node&& other) noexcept;