WIP: Propagate SurfaceID up window tree hierarchy

ui/views/mus/native_widget_mus.cc

Index: ui/views/mus/native_widget_mus.cc
diff --git a/ui/views/mus/native_widget_mus.cc b/ui/views/mus/native_widget_mus.cc
index 959b656065b347cef0eaa371f17eed9ab0c75cd7..7381ba5a7d40ae6ea89bfb32e5e1cfe954e40581 100644
--- a/ui/views/mus/native_widget_mus.cc
+++ b/ui/views/mus/native_widget_mus.cc
@@ -5,6 +5,7 @@
 #include "ui/views/mus/native_widget_mus.h"
 
 #include "base/callback.h"
+#include "base/debug/stack_trace.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
@@ -29,6 +30,7 @@
 #include "ui/display/screen.h"
 #include "ui/events/event.h"
 #include "ui/gfx/canvas.h"
+#include "ui/gfx/geometry/dip_util.h"
 #include "ui/gfx/path.h"
 #include "ui/native_theme/native_theme_aura.h"
 #include "ui/platform_window/platform_window_delegate.h"
@@ -57,6 +59,15 @@ DEFINE_WINDOW_PROPERTY_KEY(ui::Window*, kMusWindow, nullptr);
 
 MUS_DEFINE_WINDOW_PROPERTY_KEY(NativeWidgetMus*, kNativeWidgetMusKey, nullptr);
 
+void SatisfyCallback(const cc::SurfaceSequence& sequence) {
+  fprintf(stderr, ">>>%s\n", __PRETTY_FUNCTION__);
+}
+
+void RequireCallback(const cc::SurfaceId& id,
+                     const cc::SurfaceSequence& sequence) {
+  fprintf(stderr, ">>>%s\n", __PRETTY_FUNCTION__);
+}
+
 // This ensures that only the top-level aura Window can be activated.
 class FocusRulesImpl : public wm::BaseFocusRules {
  public:
@@ -407,6 +418,23 @@ class NativeWidgetMus::MusWindowObserver : public ui::WindowObserver {
   void OnWindowVisibilityChanged(ui::Window* window) override {
     native_widget_mus_->OnMusWindowVisibilityChanged(window);
   }
+
+  void OnChildWindowSurfaceCreated(
+      ui::Window* window,
+      const gfx::Size& size,
+      float device_scale_factor,
+      const cc::SurfaceId& surface_id,
+      const cc::SurfaceSequence& surface_sequence) override {
+    //NativeWidgetMus* nwm = NativeWidgetMus::GetForWindow(window);
+    //fprintf(stderr, ">>>>%s nwm: %p\n", __PRETTY_FUNCTION__, nwm);
+    //if (nwm) {
+    //  gfx::Size size_in_dip = gfx::ConvertSizeToDIP(device_scale_factor, size);
+    //  nwm->GetNativeView()->layer()->SetShowSurface(
+    //      surface_id, base::Bind(&SatisfyCallback),
+    //      base::Bind(&RequireCallback), size, device_scale_factor, size_in_dip);
+    //}
+  }
+
   void OnWindowPredefinedCursorChanged(ui::Window* window,
                                        ui::mojom::Cursor cursor) override {
     DCHECK_EQ(window, mus_window());
@@ -524,6 +552,7 @@ NativeWidgetMus::NativeWidgetMus(internal::NativeWidgetDelegate* delegate,
       ownership_(Widget::InitParams::NATIVE_WIDGET_OWNS_WIDGET),
       content_(new aura::Window(this)),
       close_widget_factory_(this) {
+  // base::debug::StackTrace().Print();
   window_->set_input_event_handler(this);
   mus_window_observer_.reset(new MusWindowObserver(this));