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/core/SkNormalFlatSource.h b/src/core/SkNormalFlatSource.h
index 4a8f74304b..82b56f1a8b 100644
--- a/src/core/SkNormalFlatSource.h
+++ b/src/core/SkNormalFlatSource.h
@@ -31,7 +31,7 @@ private:
     public:
         Provider();
 
-        virtual ~Provider();
+        ~Provider() override;
 
         void fillScanLine(int x, int y, SkPoint3 output[], int count) const override;