Mark overridden destructors with 'override' and remove 'virtual'

This silences a new warning in clang 5.0

Change-Id: Ieb5b75a6ffed60107c3fd16075d2ecfd515b55e8
Reviewed-on: https://skia-review.googlesource.com/10006
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Mike Klein <mtklein@chromium.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/utils/SkCanvasStack.h b/src/utils/SkCanvasStack.h
index cdeeb843b6..22cfc3e538 100644
--- a/src/utils/SkCanvasStack.h
+++ b/src/utils/SkCanvasStack.h
@@ -21,7 +21,7 @@
 class SkCanvasStack : public SkNWayCanvas {
 public:
     SkCanvasStack(int width, int height);
-    virtual ~SkCanvasStack();
+    ~SkCanvasStack() override;
 
     void pushCanvas(std::unique_ptr<SkCanvas>, const SkIPoint& origin);
     void removeAll() override;