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 377e2cad1be14236adc72a11b9c508a03e366f82..52134dfa203c474b5fb16b4eebc0c7d3995f311b 100644
--- a/third_party/WebKit/Source/platform/BUILD.gn
+++ b/third_party/WebKit/Source/platform/BUILD.gn
@@ -1025,6 +1025,8 @@ 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",
@@ -1688,6 +1690,7 @@ 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",