ModifierKey unifies sk_app::Window::ModifierKey & Sample::Click::ModifierKey

Change-Id: Idb5dfe57a7f6e3d6078ab1e68d542b084114cfbe
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/225735
Commit-Queue: Hal Canary <halcanary@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
diff --git a/samplecode/SampleLayers.cpp b/samplecode/SampleLayers.cpp
index 03388e6..cb981f5 100644
--- a/samplecode/SampleLayers.cpp
+++ b/samplecode/SampleLayers.cpp
@@ -224,7 +224,7 @@
         return true;
     }
 
-    Sample::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned modi) override {
+    Sample::Click* onFindClickHandler(SkScalar x, SkScalar y, ModifierKey modi) override {
         return new Click(this);
     }