Fix building with glib2.0 2.67 (unstable version)

DEBUG: FAILED: obj/ui/accessibility/platform/platform/ax_platform_atk_hyperlink.o 
DEBUG: ../../ui/accessibility/platform/ax_platform_atk_hyperlink.cc:252:7: error: cannot initialize a parameter of type 'unsigned long *' with an rvalue of type 'typename std::remove_reference<decltype(*(&type_volatile))>::type *' (aka 'volatile unsigned long *')
DEBUG:   if (g_once_init_enter(&type_volatile)) {
DEBUG:       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
DEBUG: /usr/include/glib-2.0/glib/gthread.h:260:7: note: expanded from macro 'g_once_init_enter'
DEBUG:     (!g_atomic_pointer_get (location) &&                             \
DEBUG:       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
DEBUG: /usr/include/glib-2.0/glib/gatomic.h:112:38: note: expanded from macro 'g_atomic_pointer_get'
DEBUG:     __atomic_load (gapg_temp_atomic, &gapg_temp_newval, __ATOMIC_SEQ_CST); \
DEBUG:                                      ^~~~~~~~~~~~~~~~~
DEBUG: 1 error generated.

diff --git a/ui/accessibility/platform/ax_platform_atk_hyperlink.cc b/ui/accessibility/platform/ax_platform_atk_hyperlink.cc
index be91def6b..73f202356 100644
--- a/ui/accessibility/platform/ax_platform_atk_hyperlink.cc
+++ b/ui/accessibility/platform/ax_platform_atk_hyperlink.cc
@@ -245,7 +245,7 @@ static void AXPlatformAtkHyperlinkInit(AXPlatformAtkHyperlink* self, gpointer) {
 }
 
 GType ax_platform_atk_hyperlink_get_type() {
-  static volatile gsize type_volatile = 0;
+  static gsize type_volatile = 0;
 
   AXPlatformNodeAuraLinux::EnsureGTypeInit();
 
diff --git a/ui/accessibility/platform/ax_platform_node_auralinux.cc b/ui/accessibility/platform/ax_platform_node_auralinux.cc
index 04125c6fd..6c64e5d8e 100644
--- a/ui/accessibility/platform/ax_platform_node_auralinux.cc
+++ b/ui/accessibility/platform/ax_platform_node_auralinux.cc
@@ -2274,7 +2274,7 @@ void ClassInit(gpointer class_pointer, gpointer /* class_data */) {
 GType GetType() {
   AXPlatformNodeAuraLinux::EnsureGTypeInit();
 
-  static volatile gsize type_volatile = 0;
+  static gsize type_volatile = 0;
   if (g_once_init_enter(&type_volatile)) {
     static const GTypeInfo type_info = {
         sizeof(AXPlatformNodeAuraLinuxClass),  // class_size
diff --git a/ui/gtk/gtk_key_bindings_handler.cc b/ui/gtk/gtk_key_bindings_handler.cc
index c663a2074..38a342484 100644
--- a/ui/gtk/gtk_key_bindings_handler.cc
+++ b/ui/gtk/gtk_key_bindings_handler.cc
@@ -141,7 +141,7 @@ void GtkKeyBindingsHandler::HandlerClassInit(HandlerClass* klass) {
 }
 
 GType GtkKeyBindingsHandler::HandlerGetType() {
-  static volatile gsize type_id_volatile = 0;
+  static gsize type_id_volatile = 0;
   if (g_once_init_enter(&type_id_volatile)) {
     GType type_id = g_type_register_static_simple(
         GTK_TYPE_TEXT_VIEW, g_intern_static_string("GtkKeyBindingsHandler"),