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/src/pdf/SkPDFBitmap.h b/src/pdf/SkPDFBitmap.h
index c1ada1a..6816ed6 100644
--- a/src/pdf/SkPDFBitmap.h
+++ b/src/pdf/SkPDFBitmap.h
@@ -27,8 +27,8 @@
     // Returns NULL on unsupported bitmap;
     static SkPDFBitmap* Create(SkPDFCanon*, const SkBitmap&);
     ~SkPDFBitmap();
-    void emitObject(SkWStream*, SkPDFCatalog*) SK_OVERRIDE;
-    void addResources(SkPDFCatalog*) const SK_OVERRIDE;
+    void emitObject(SkWStream*, SkPDFCatalog*) override;
+    void addResources(SkPDFCatalog*) const override;
     bool equals(const SkBitmap& other) const {
         return fBitmap.getGenerationID() == other.getGenerationID() &&
                fBitmap.pixelRefOrigin() == other.pixelRefOrigin() &&