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/images/SkImageDecoder_libwebp.cpp b/src/images/SkImageDecoder_libwebp.cpp
index d2061db..decccd1 100644
--- a/src/images/SkImageDecoder_libwebp.cpp
+++ b/src/images/SkImageDecoder_libwebp.cpp
@@ -98,14 +98,14 @@
         fHasAlpha = 0;
     }
 
-    Format getFormat() const SK_OVERRIDE {
+    Format getFormat() const override {
         return kWEBP_Format;
     }
 
 protected:
-    bool onBuildTileIndex(SkStreamRewindable *stream, int *width, int *height) SK_OVERRIDE;
-    bool onDecodeSubset(SkBitmap* bitmap, const SkIRect& rect) SK_OVERRIDE;
-    Result onDecode(SkStream* stream, SkBitmap* bm, Mode) SK_OVERRIDE;
+    bool onBuildTileIndex(SkStreamRewindable *stream, int *width, int *height) override;
+    bool onDecodeSubset(SkBitmap* bitmap, const SkIRect& rect) override;
+    Result onDecode(SkStream* stream, SkBitmap* bm, Mode) override;
 
 private:
     /**
@@ -583,7 +583,7 @@
 
 class SkWEBPImageEncoder : public SkImageEncoder {
 protected:
-    bool onEncode(SkWStream* stream, const SkBitmap& bm, int quality) SK_OVERRIDE;
+    bool onEncode(SkWStream* stream, const SkBitmap& bm, int quality) override;
 
 private:
     typedef SkImageEncoder INHERITED;