Fix for PNG, coding style, skip opaque.

src/images/SkImageDecoder_libpng.cpp

Index: src/images/SkImageDecoder_libpng.cpp
diff --git a/src/images/SkImageDecoder_libpng.cpp b/src/images/SkImageDecoder_libpng.cpp
index ac334fc24d55ddd2fd9b3132517c07ea93614fe8..0237e461769d59d0e8fd84738cc0eaa0b52f4103 100644
--- a/src/images/SkImageDecoder_libpng.cpp
+++ b/src/images/SkImageDecoder_libpng.cpp
@@ -384,7 +384,8 @@ bool SkPNGImageDecoder::onDecode(SkStream* sk_stream, SkBitmap* decodedBitmap,
             upscale png's palette to a direct model
          */
         SkAutoLockColors ctLock(colorTable);
-        if (!sampler.begin(decodedBitmap, sc, doDither, ctLock.colors())) {
+        if (!sampler.begin(decodedBitmap, sc, doDither, ctLock.colors(),
+                           this->getRequireUnpremultipliedColors())) {
             return false;
         }
         const int height = decodedBitmap->height();
@@ -800,7 +801,8 @@ bool SkPNGImageDecoder::onDecodeSubset(SkBitmap* bm, const SkIRect& region) {
             upscale png's palette to a direct model
          */
         SkAutoLockColors ctLock(colorTable);
-        if (!sampler.begin(&decodedBitmap, sc, doDither, ctLock.colors())) {
+        if (!sampler.begin(&decodedBitmap, sc, doDither, ctLock.colors(),
+                           this->getRequireUnpremultipliedColors())) {
             return false;
         }
         const int height = decodedBitmap.height();