Move gif image decoder to SkCodec

third_party/WebKit/Source/platform/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//testing/libfuzzer/fuzzer_test.gni")
 import("//testing/test.gni")
 import("//third_party/WebKit/public/public_features.gni")
 import("//third_party/WebKit/Source/build/scripts/scripts.gni")
@@ skipping 1046 matching lines @@
     "image-decoders/ImageFrame.cpp",
     "image-decoders/ImageFrame.h",
     "image-decoders/SegmentReader.cpp",
     "image-decoders/SegmentReader.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",
     "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",
@@ skipping 986 matching lines @@
     "//third_party/WebKit/Source:inside_blink",
   ]
 
   deps = [
     ":test_support",
     "//cc/surfaces:surface_id",
     "//testing/gmock",
     "//testing/gtest",
   ]
 }