C++11 override should now be supported by all of {bots,Chrome,Android,Mozilla}

NOPRESUBMIT=true

BUG=skia:
DOCS_PREVIEW= https://skia.org/?cl=1037793002

Review URL: https://codereview.chromium.org/1037793002
diff --git a/src/animator/SkXMLAnimatorWriter.h b/src/animator/SkXMLAnimatorWriter.h
index 1aedada..2f6721d 100644
--- a/src/animator/SkXMLAnimatorWriter.h
+++ b/src/animator/SkXMLAnimatorWriter.h
@@ -23,10 +23,10 @@
     SkDEBUGCODE(static void UnitTest(class SkCanvas* canvas);)
 
 protected:
-    void onAddAttributeLen(const char name[], const char value[], size_t length) SK_OVERRIDE;
-    void onEndElement() SK_OVERRIDE;
-    void onStartElementLen(const char elem[], size_t length) SK_OVERRIDE;
-    void onAddText(const char text[], size_t length) SK_OVERRIDE;
+    void onAddAttributeLen(const char name[], const char value[], size_t length) override;
+    void onEndElement() override;
+    void onStartElementLen(const char elem[], size_t length) override;
+    void onAddText(const char text[], size_t length) override;
 
 private:
     SkAnimator* fAnimator;