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

gm/mipmap.cpp

Index: gm/mipmap.cpp
diff --git a/gm/mipmap.cpp b/gm/mipmap.cpp
index 70543a91f1729f43d049ae72a3f449e8b09ea48b..2d4ee0d26e27e36ace8bfc36faecd721d2c6e08c 100644
--- a/gm/mipmap.cpp
+++ b/gm/mipmap.cpp
@@ -53,11 +53,11 @@ public:
     MipMapGM() {}
 
 protected:
-    SkString onShortName() SK_OVERRIDE { return SkString("mipmap"); }
+    SkString onShortName() override { return SkString("mipmap"); }
 
-    SkISize onISize() SK_OVERRIDE { return SkISize::Make(400, 200); }
+    SkISize onISize() override { return SkISize::Make(400, 200); }
 
-    void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+    void onDraw(SkCanvas* canvas) override {
         test_mip(canvas);
     }