Remove Skia GYP files from Chromium tree.

skia/skia_gn_files.gypi

-# This file is read into the GN build.
-
-# Files are relative to third_party/skia.
-{
-  'skia_library_sources': [
-    '<(skia_src_path)/ports/SkImageGenerator_none.cpp',
-
-    '<(skia_src_path)/fonts/SkFontMgr_indirect.cpp',
-    '<(skia_src_path)/fonts/SkRemotableFontMgr.cpp',
-    '<(skia_src_path)/ports/SkFontConfigInterface_direct.cpp',
-    '<(skia_src_path)/ports/SkFontConfigInterface_direct_factory.cpp',
-    '<(skia_src_path)/ports/SkFontHost_FreeType_common.cpp',
-    '<(skia_src_path)/ports/SkFontHost_FreeType.cpp',
-    '<(skia_src_path)/ports/SkFontHost_mac.cpp',
-    '<(skia_src_path)/ports/SkFontHost_win.cpp',
-    '<(skia_src_path)/ports/SkFontMgr_android.cpp',
-    '<(skia_src_path)/ports/SkFontMgr_android_factory.cpp',
-    '<(skia_src_path)/ports/SkFontMgr_android_parser.cpp',
-    '<(skia_src_path)/ports/SkFontMgr_FontConfigInterface.cpp',
-    '<(skia_src_path)/ports/SkFontMgr_FontConfigInterface_factory.cpp',
-    '<(skia_src_path)/ports/SkFontMgr_win_dw.cpp',
-    '<(skia_src_path)/ports/SkGlobalInitialization_default.cpp',
-    '<(skia_src_path)/ports/SkImageEncoder_none.cpp',
-    '<(skia_src_path)/ports/SkOSFile_posix.cpp',
-    '<(skia_src_path)/ports/SkRemotableFontMgr_win_dw.cpp',
-    '<(skia_src_path)/ports/SkOSFile_stdio.cpp',
-    '<(skia_src_path)/ports/SkOSFile_win.cpp',
-    '<(skia_src_path)/ports/SkScalerContext_win_dw.cpp',
-    '<(skia_src_path)/ports/SkTLS_pthread.cpp',
-    '<(skia_src_path)/ports/SkTLS_win.cpp',
-    '<(skia_src_path)/ports/SkTypeface_win_dw.cpp',
-    '<(skia_src_path)/sfnt/SkOTTable_name.cpp',
-    '<(skia_src_path)/sfnt/SkOTUtils.cpp',
-
-    #mac
-    '<(skia_src_path)/utils/mac/SkStream_mac.cpp',
-
-    #windows
-
-    #testing
-    '<(skia_src_path)/fonts/SkGScalerContext.cpp',
-  ],
-}