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/bitmapsource.cpp b/gm/bitmapsource.cpp
index 1c35a0b..d59524f 100644
--- a/gm/bitmapsource.cpp
+++ b/gm/bitmapsource.cpp
@@ -17,7 +17,7 @@
     }
 
 protected:
-    SkString onShortName() SK_OVERRIDE {
+    SkString onShortName() override {
         return SkString("bitmapsource");
     }
 
@@ -34,9 +34,9 @@
         canvas.drawText(str, strlen(str), SkIntToScalar(20), SkIntToScalar(70), paint);
     }
 
-    SkISize onISize() SK_OVERRIDE { return SkISize::Make(500, 150); }
+    SkISize onISize() override { return SkISize::Make(500, 150); }
 
-    void onOnceBeforeDraw() SK_OVERRIDE {
+    void onOnceBeforeDraw() override {
         this->makeBitmap();
     }
 
@@ -49,7 +49,7 @@
         canvas->restore();
     }
 
-    void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+    void onDraw(SkCanvas* canvas) override {
         canvas->clear(0x00000000);
         {
             SkRect srcRect = SkRect::MakeXYWH(20, 20, 30, 30);