Update Layer Hoisting to store its atlas texture in the resource cache

BUG=skia:4346

Committed: https://skia.googlesource.com/skia/+/42597bc99f00553825843b5ed41e81b121773368

Review URL: https://codereview.chromium.org/1406013006
diff --git a/src/gpu/GrRectanizer_skyline.h b/src/gpu/GrRectanizer_skyline.h
index a06bba0..576b1fc 100644
--- a/src/gpu/GrRectanizer_skyline.h
+++ b/src/gpu/GrRectanizer_skyline.h
@@ -19,9 +19,9 @@
         this->reset();
     }
 
-    virtual ~GrRectanizerSkyline() { }
+    ~GrRectanizerSkyline() override { }
 
-    void reset() override{
+    void reset() override {
         fAreaSoFar = 0;
         fSkyline.reset();
         SkylineSegment* seg = fSkyline.append(1);