Support format using enum argument for Async readback

content/browser/renderer_host/render_widget_host_view_mac.mm

Index: content/browser/renderer_host/render_widget_host_view_mac.mm
diff --git a/content/browser/renderer_host/render_widget_host_view_mac.mm b/content/browser/renderer_host/render_widget_host_view_mac.mm
index 4a1f30ba03302a30c74e4b1b4b0bae50be9c032d..4c53eb3fe8da11a63daf933e385d5e9a6546aca7 100644
--- a/content/browser/renderer_host/render_widget_host_view_mac.mm
+++ b/content/browser/renderer_host/render_widget_host_view_mac.mm
@@ -1135,8 +1135,8 @@ void RenderWidgetHostViewMac::CopyFromCompositingSurface(
     const gfx::Rect& src_subrect,
     const gfx::Size& dst_size,
     const base::Callback<void(bool, const SkBitmap&)>& callback,
-    bool readback_config_rgb565) {
-  if (readback_config_rgb565) {
+    const SkBitmap::Config config) {
+  if (config != SkBitmap::kARGB_8888_Config) {
     NOTIMPLEMENTED();
     callback.Run(false, SkBitmap());
   }