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/SampleSG.cpp b/samplecode/SampleSG.cpp
index fc29c39..e129de1 100644
--- a/samplecode/SampleSG.cpp
+++ b/samplecode/SampleSG.cpp
@@ -72,7 +72,7 @@
         fScene->render(canvas);
     }
 
-    Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned modi) override {
+    Click* onFindClickHandler(SkScalar x, SkScalar y, ModifierKey modi) override {
         if (auto node = fScene->nodeAt({x, y})) {
             Click* click = new Click(this);
             click->fMeta.setPtr("node", (void*)node);