Support color xforms for kIndex8 pngs

src/codec/SkCodecImageGenerator.cpp

Index: src/codec/SkCodecImageGenerator.cpp
diff --git a/src/codec/SkCodecImageGenerator.cpp b/src/codec/SkCodecImageGenerator.cpp
index e579da92f6f435c8a34ba21aae5fdfb02f2cbe23..1bae1df856e1f5c8ca7a5a02b0ead1ddb72b976f 100644
--- a/src/codec/SkCodecImageGenerator.cpp
+++ b/src/codec/SkCodecImageGenerator.cpp
@@ -37,7 +37,12 @@ SkData* SkCodecImageGenerator::onRefEncodedData(SK_REFENCODEDDATA_CTXPARAM) {
 bool SkCodecImageGenerator::onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes,
         SkPMColor ctable[], int* ctableCount) {
 
-    SkCodec::Result result = fCodec->getPixels(info, pixels, rowBytes, nullptr, ctable,
+    // FIXME (msarett):
+    // We don't give the client the chance to request an SkColorSpace.  Until we improve
+    // the API, let's assume that they want legacy mode.
+    SkImageInfo decodeInfo = info.makeColorSpace(nullptr);
+
+    SkCodec::Result result = fCodec->getPixels(decodeInfo, pixels, rowBytes, nullptr, ctable,
             ctableCount);
     switch (result) {
         case SkCodec::kSuccess: