Consolidate OutputSurface constructors into GL vs Vulkan.

android_webview/browser/parent_output_surface.cc

Index: android_webview/browser/parent_output_surface.cc
diff --git a/android_webview/browser/parent_output_surface.cc b/android_webview/browser/parent_output_surface.cc
index e73fecf42893ccf376741748c7b759a84ec017a5..22bcaf0731361078f2077d152b9f356a03610f4f 100644
--- a/android_webview/browser/parent_output_surface.cc
+++ b/android_webview/browser/parent_output_surface.cc
@@ -11,7 +11,7 @@ namespace android_webview {
 
 ParentOutputSurface::ParentOutputSurface(
     scoped_refptr<cc::ContextProvider> context_provider)
-    : cc::OutputSurface(context_provider) {
+    : cc::OutputSurface(std::move(context_provider), nullptr, nullptr) {
   stencil_state_.stencil_test_enabled = false;
 }