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/picture.cpp b/gm/picture.cpp
index 5432fc9..f1d2a79 100644
--- a/gm/picture.cpp
+++ b/gm/picture.cpp
@@ -44,19 +44,19 @@
     {}
 
 protected:
-    void onOnceBeforeDraw() SK_OVERRIDE {
+    void onOnceBeforeDraw() override {
          fPicture.reset(make_picture());
     }
 
-    SkString onShortName() SK_OVERRIDE {
+    SkString onShortName() override {
         return SkString("pictures");
     }
 
-    SkISize onISize() SK_OVERRIDE {
+    SkISize onISize() override {
         return SkISize::Make(450, 120);
     }
 
-    void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+    void onDraw(SkCanvas* canvas) override {
         canvas->translate(10, 10);
 
         SkMatrix matrix;