hide SkImageDecoder::Chooser

src/images/SkImageDecoder_libgif.cpp

Index: src/images/SkImageDecoder_libgif.cpp
diff --git a/src/images/SkImageDecoder_libgif.cpp b/src/images/SkImageDecoder_libgif.cpp
index bbcd22316931b5f7b1cb481d2efd23542f6aed42..7b6a4741df8756ca68b7b9061d59aa8f1cc941b3 100644
--- a/src/images/SkImageDecoder_libgif.cpp
+++ b/src/images/SkImageDecoder_libgif.cpp
@@ -309,10 +309,12 @@ bool SkGIFImageDecoder::onDecode(SkStream* sk_stream, SkBitmap* bm, Mode mode) {
                 imageTop = 0;
             }
 
+#ifdef SK_SUPPORT_LEGACY_IMAGEDECODER_CHOOSER
             // FIXME: We could give the caller a choice of images or configs.
             if (!this->chooseFromOneChoice(kIndex_8_SkColorType, width, height)) {
                 return error_return(*bm, "chooseFromOneChoice");
             }
+#endif
 
             SkScaledBitmapSampler sampler(width, height, this->getSampleSize());