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/SkYUVPlanesCache.cpp b/src/core/SkYUVPlanesCache.cpp
index 07a07c698b..a962d5a4b7 100644
--- a/src/core/SkYUVPlanesCache.cpp
+++ b/src/core/SkYUVPlanesCache.cpp
@@ -39,7 +39,7 @@ struct YUVPlanesRec : public SkResourceCache::Rec {
         fValue.fInfo = *info;
         fValue.fData->attachToCacheAndRef();
     }
-    ~YUVPlanesRec() {
+    ~YUVPlanesRec() override {
         fValue.fData->detachFromCacheAndUnref();
     }