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/gm/gm.h b/gm/gm.h
index e263528..87ad927 100644
--- a/gm/gm.h
+++ b/gm/gm.h
@@ -126,9 +126,9 @@
                  const SkISize& size)
             : fName(name), fDrawProc(drawProc), fSize(size) {}
     protected:
-        void onDraw(SkCanvas* canvas) SK_OVERRIDE;
-        SkISize onISize() SK_OVERRIDE;
-        SkString onShortName() SK_OVERRIDE;
+        void onDraw(SkCanvas* canvas) override;
+        SkISize onISize() override;
+        SkString onShortName() override;
     private:
         SkString fName;
         void (*fDrawProc)(SkCanvas*);