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

tests/OnceTest.cpp

Index: tests/OnceTest.cpp
diff --git a/tests/OnceTest.cpp b/tests/OnceTest.cpp
index 1344cee5c44e4f3b7da15e80662011e23237f4bc..034c5d912f953705926d5ea19961627966730db7 100644
--- a/tests/OnceTest.cpp
+++ b/tests/OnceTest.cpp
@@ -39,7 +39,7 @@ public:
     SkOnceFlag* once;
     int* ptr;
 
-    void run() SK_OVERRIDE {
+    void run() override {
         SkOnce(once, add_six, ptr);
     }
 };