hide SkImageDecoder::Chooser

src/images/SkImageDecoder_pkm.cpp

Index: src/images/SkImageDecoder_pkm.cpp
diff --git a/src/images/SkImageDecoder_pkm.cpp b/src/images/SkImageDecoder_pkm.cpp
index 79da8da51a1d80a059cf17aa0bcdb491c7ceba23..d555c6afccccddc0c619978bc9c2ce053a212cbc 100644
--- a/src/images/SkImageDecoder_pkm.cpp
+++ b/src/images/SkImageDecoder_pkm.cpp
@@ -46,10 +46,12 @@ bool SkPKMImageDecoder::onDecode(SkStream* stream, SkBitmap* bm, Mode mode) {
     const unsigned short width = etc1_pkm_get_width(buf);
     const unsigned short height = etc1_pkm_get_height(buf);
 
+#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
 
     // Setup the sampler...
     SkScaledBitmapSampler sampler(width, height, this->getSampleSize());