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/samplecode/SampleSlides.cpp b/samplecode/SampleSlides.cpp
index b626cdb..6899fc1 100644
--- a/samplecode/SampleSlides.cpp
+++ b/samplecode/SampleSlides.cpp
@@ -697,7 +697,7 @@
 
 protected:
     // overrides from SkEventSink
-    bool onQuery(SkEvent* evt) SK_OVERRIDE {
+    bool onQuery(SkEvent* evt) override {
         if (SampleCode::TitleQ(*evt)) {
             SampleCode::TitleR(evt, "Slides");
             return true;
@@ -705,12 +705,12 @@
         return this->INHERITED::onQuery(evt);
     }
 
-    void onDrawContent(SkCanvas* canvas) SK_OVERRIDE {
+    void onDrawContent(SkCanvas* canvas) override {
         this->init();
         gProc[fIndex](canvas);
     }
 
-    SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned) SK_OVERRIDE {
+    SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned) override {
         this->init();
         fIndex = (fIndex + 1) % SK_ARRAY_COUNT(gProc);
         this->inval(NULL);