WIP: Implement APNG

third_party/WebKit/Source/platform/BUILD.gn

Index: third_party/WebKit/Source/platform/BUILD.gn
diff --git a/third_party/WebKit/Source/platform/BUILD.gn b/third_party/WebKit/Source/platform/BUILD.gn
index dd8ccc7711ecddc712c83a39b8ef07ae4b84f56e..d27bef1ac58ef04c9cdce3fbebafd71352f1ab8c 100644
--- a/third_party/WebKit/Source/platform/BUILD.gn
+++ b/third_party/WebKit/Source/platform/BUILD.gn
@@ -1029,6 +1029,8 @@ component("platform") {
     "image-decoders/jpeg/JPEGImageDecoder.h",
     "image-decoders/png/PNGImageDecoder.cpp",
     "image-decoders/png/PNGImageDecoder.h",
+    "image-decoders/png/PNGImageReader.cpp",
+    "image-decoders/png/PNGImageReader.h",
     "image-decoders/webp/WEBPImageDecoder.cpp",
     "image-decoders/webp/WEBPImageDecoder.h",
     "image-encoders/ImageEncoderUtils.cpp",
@@ -1694,6 +1696,7 @@ test("blink_platform_unittests") {
     "image-decoders/gif/GIFImageDecoderTest.cpp",
     "image-decoders/ico/ICOImageDecoderTest.cpp",
     "image-decoders/jpeg/JPEGImageDecoderTest.cpp",
+    "image-decoders/png/PNGImageDecoderTest.cpp",
     "image-decoders/webp/WEBPImageDecoderTest.cpp",
     "json/JSONParserTest.cpp",
     "mac/VersionUtilMacTest.mm",