forward concat44 in nway canvas

Change-Id: If4eb791c0701fb7055283e721308bd3c633576d7
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/263572
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
diff --git a/samplecode/SampleClip.cpp b/samplecode/SampleClip.cpp
index b5d6a78..a25bd54 100644
--- a/samplecode/SampleClip.cpp
+++ b/samplecode/SampleClip.cpp
@@ -547,7 +547,7 @@
     }
 
     void onDrawContent(SkCanvas* canvas) override {
-        SkMatrix mx = this->get44({0, 0, 400, 400});
+        SkMatrix44 mx = this->get44({0, 0, 400, 400});
 
         SkPaint paint;
         paint.setColor({0.75, 0.75, 0.75, 1});
@@ -612,12 +612,10 @@
     }
 
     void onDrawContent(SkCanvas* canvas) override {
-        SkMatrix mx = this->get44({0, 0, 300, 300});
-
         SkPaint paint;
 
         canvas->save();
-        canvas->concat(mx);
+        canvas->concat(this->get44({0, 0, 300, 300}));
 
         const SkPoint* tex = nullptr;
         const SkColor* col = nullptr;