hide SkImageDecoder::Chooser

src/images/SkImageDecoder_ktx.cpp

Index: src/images/SkImageDecoder_ktx.cpp
diff --git a/src/images/SkImageDecoder_ktx.cpp b/src/images/SkImageDecoder_ktx.cpp
index fd1db5e9d2e0283df9c9f8818a56cdf16428c5f7..effc1edcc11131b87f7f71579604f7326583314e 100644
--- a/src/images/SkImageDecoder_ktx.cpp
+++ b/src/images/SkImageDecoder_ktx.cpp
@@ -62,10 +62,12 @@ bool SkKTXImageDecoder::onDecode(SkStream* stream, SkBitmap* bm, Mode mode) {
     const unsigned short width = ktxFile.width();
     const unsigned short height = ktxFile.height();
 
+#ifdef SK_SUPPORT_LEGACY_IMAGEDECODER_CHOOSER
     // should we allow the Chooser (if present) to pick a config for us???
     if (!this->chooseFromOneChoice(kN32_SkColorType, width, height)) {
         return false;
     }
+#endif
 
     // Set a flag if our source is premultiplied alpha
     const SkString premulKey("KTXPremultipliedAlpha");