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/giantbitmap.cpp b/gm/giantbitmap.cpp
index bb9a655..2ee3797 100644
--- a/gm/giantbitmap.cpp
+++ b/gm/giantbitmap.cpp
@@ -72,7 +72,7 @@
 
 protected:
 
-    SkString onShortName() SK_OVERRIDE {
+    SkString onShortName() override {
         SkString str("giantbitmap_");
         switch (fMode) {
             case SkShader::kClamp_TileMode:
@@ -92,9 +92,9 @@
         return str;
     }
 
-    SkISize onISize() SK_OVERRIDE { return SkISize::Make(640, 480); }
+    SkISize onISize() override { return SkISize::Make(640, 480); }
 
-    void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+    void onDraw(SkCanvas* canvas) override {
         SkPaint paint;
 
         SkMatrix m;