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

src/gpu/gl/SkNullGLContext.cpp

Index: src/gpu/gl/SkNullGLContext.cpp
diff --git a/src/gpu/gl/SkNullGLContext.cpp b/src/gpu/gl/SkNullGLContext.cpp
index 42dafc5dee0631c39ce772a0667cea6ac460a7b6..69b559629c77597e457c48ace718ee7a12686f19 100644
--- a/src/gpu/gl/SkNullGLContext.cpp
+++ b/src/gpu/gl/SkNullGLContext.cpp
@@ -337,7 +337,7 @@ GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetBufferParameteriv(GrGLenum target, GrGLenu
 class NullInterface : public GrGLInterface {
 public:
     NullInterface(State* state) : fState(SkRef(state)) {}
-    ~NullInterface() SK_OVERRIDE {
+    ~NullInterface() override {
         fState->unref();
     }
     State* fState;