mash: wires up shadows for mash

ash/mus/window_manager.cc

Index: ash/mus/window_manager.cc
diff --git a/ash/mus/window_manager.cc b/ash/mus/window_manager.cc
index 03a99b4d11fad1a1e3b1432d03b0edd272141bf2..e9f5f9f6227899401df0f9e6490850b8fc828901 100644
--- a/ash/mus/window_manager.cc
+++ b/ash/mus/window_manager.cc
@@ -51,6 +51,7 @@
 #include "ui/views/mus/pointer_watcher_event_router.h"
 #include "ui/views/mus/screen_mus.h"
 #include "ui/wm/core/capture_controller.h"
+#include "ui/wm/core/shadow_types.h"
 #include "ui/wm/core/wm_state.h"
 #include "ui/wm/public/activation_client.h"
 
@@ -69,6 +70,9 @@ WindowManager::WindowManager(service_manager::Connector* connector)
       ui::mojom::WindowManager::kRenderParentTitleArea_Property);
   property_converter_->RegisterProperty(
       kShelfItemTypeKey, ui::mojom::WindowManager::kShelfItemType_Property);
+  property_converter_->RegisterProperty(
+      ::wm::kShadowElevationKey,
+      ui::mojom::WindowManager::kShadowElevation_Property);
 }
 
 WindowManager::~WindowManager() {
@@ -316,13 +320,10 @@ bool WindowManager::OnWmSetProperty(
         new_data ? mojo::ConvertTo<bool>(**new_data) : false);
     return false;  // Won't attempt to map through property converter.
   }
-  return name == ui::mojom::WindowManager::kAppIcon_Property ||
-         name == ui::mojom::WindowManager::kShowState_Property ||
-         name == ui::mojom::WindowManager::kPreferredSize_Property ||
-         name == ui::mojom::WindowManager::kResizeBehavior_Property ||
-         name == ui::mojom::WindowManager::kShelfItemType_Property ||
-         name == ui::mojom::WindowManager::kWindowIcon_Property ||
-         name == ui::mojom::WindowManager::kWindowTitle_Property;
+  if (property_converter_->IsTransportNameRegistered(name))
+    return true;
+  DVLOG(1) << "unknown property changed, ignoring " << name;
+  return false;
 }
 
 void WindowManager::OnWmSetCanFocus(aura::Window* window, bool can_focus) {