Move gif image decoder to SkCodec

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 c19880f653b3ec74f035582006c125dfa0fdf253..230c07225d8c6c778993cda61150b74c20c1731e 100644
--- a/third_party/WebKit/Source/platform/BUILD.gn
+++ b/third_party/WebKit/Source/platform/BUILD.gn
@@ -1166,14 +1166,14 @@ component("platform") {
     "image-decoders/ImageFrame.h",
     "image-decoders/SegmentReader.cpp",
     "image-decoders/SegmentReader.h",
+    "image-decoders/SegmentStream.cpp",
+    "image-decoders/SegmentStream.h",
     "image-decoders/bmp/BMPImageDecoder.cpp",
     "image-decoders/bmp/BMPImageDecoder.h",
     "image-decoders/bmp/BMPImageReader.cpp",
     "image-decoders/bmp/BMPImageReader.h",
     "image-decoders/gif/GIFImageDecoder.cpp",
     "image-decoders/gif/GIFImageDecoder.h",
-    "image-decoders/gif/GIFImageReader.cpp",
-    "image-decoders/gif/GIFImageReader.h",
     "image-decoders/ico/ICOImageDecoder.cpp",
     "image-decoders/ico/ICOImageDecoder.h",
     "image-decoders/jpeg/JPEGImageDecoder.cpp",
@@ -1822,6 +1822,7 @@ test("blink_platform_unittests") {
     "image-decoders/ImageDecoderTest.cpp",
     "image-decoders/ImageDecoderTestHelpers.cpp",
     "image-decoders/ImageDecoderTestHelpers.h",
+    "image-decoders/SegmentStreamTest.cpp",
     "image-decoders/bmp/BMPImageDecoderTest.cpp",
     "image-decoders/gif/GIFImageDecoderTest.cpp",
     "image-decoders/ico/ICOImageDecoderTest.cpp",