Change skia build files to use a utils.gypi instead of hardcoded files.

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)/core/SkFlate.cpp',  # this should likely be moved into src/utils in skia
 
     '<(skia_include_path)/images/SkMovie.h',
     '<(skia_include_path)/images/SkPageFlipper.h',
     '<(skia_include_path)/ports/SkTypeface_win.h',
-    '<(skia_include_path)/utils/mac/SkCGUtils.h',
-    '<(skia_include_path)/utils/SkDeferredCanvas.h',
-    '<(skia_include_path)/utils/SkEventTracer.h',
-    '<(skia_include_path)/utils/SkMatrix44.h',
-    '<(skia_include_path)/utils/SkNullCanvas.h',
-    '<(skia_include_path)/utils/SkNWayCanvas.h',
-    '<(skia_include_path)/utils/SkPictureUtils.h',
-    '<(skia_include_path)/utils/SkProxyCanvas.h',
-    '<(skia_include_path)/utils/SkRTConf.h',
     '<(skia_src_path)/fonts/SkFontMgr_fontconfig.cpp',
     '<(skia_src_path)/fonts/SkFontMgr_indirect.cpp',
     '<(skia_src_path)/fonts/SkRemotableFontMgr.cpp',
     '<(skia_src_path)/images/SkScaledBitmapSampler.cpp',
     '<(skia_src_path)/images/SkScaledBitmapSampler.h',
     '<(skia_src_path)/ports/SkFontConfigInterface_android.cpp',
     '<(skia_src_path)/ports/SkFontConfigInterface_direct.cpp',
     '<(skia_src_path)/ports/SkFontConfigParser_android.cpp',
     '<(skia_src_path)/ports/SkFontHost_fontconfig.cpp',
     '<(skia_src_path)/ports/SkFontHost_FreeType_common.cpp',
@@ skipping 19 matching lines @@
     '<(skia_src_path)/sfnt/SkOTTable_name.cpp',
     '<(skia_src_path)/sfnt/SkOTTable_name.h',
     '<(skia_src_path)/sfnt/SkOTUtils.cpp',
     '<(skia_src_path)/sfnt/SkOTUtils.h',
     '<(skia_src_path)/utils/debugger/SkDebugCanvas.cpp',
     '<(skia_src_path)/utils/debugger/SkDebugCanvas.h',
     '<(skia_src_path)/utils/debugger/SkDrawCommand.cpp',
     '<(skia_src_path)/utils/debugger/SkDrawCommand.h',
     '<(skia_src_path)/utils/debugger/SkObjectParser.cpp',
     '<(skia_src_path)/utils/debugger/SkObjectParser.h',
-    '<(skia_src_path)/utils/SkBase64.cpp',
-    '<(skia_src_path)/utils/SkBase64.h',
-    '<(skia_src_path)/utils/SkBitSet.cpp',
-    '<(skia_src_path)/utils/SkBitSet.h',
-    '<(skia_src_path)/utils/SkCanvasStack.cpp',
-    '<(skia_src_path)/utils/SkCanvasStateUtils.cpp',
-    '<(skia_src_path)/utils/SkEventTracer.cpp',
-    '<(skia_src_path)/utils/SkDeferredCanvas.cpp',
-    '<(skia_src_path)/utils/SkMatrix22.cpp',
-    '<(skia_src_path)/utils/SkMatrix22.h',
-    '<(skia_src_path)/utils/SkMatrix44.cpp',
-    '<(skia_src_path)/utils/SkNullCanvas.cpp',
-    '<(skia_src_path)/utils/SkNWayCanvas.cpp',
-    '<(skia_src_path)/utils/SkPictureUtils.cpp',
-    '<(skia_src_path)/utils/SkProxyCanvas.cpp',
-    '<(skia_src_path)/utils/SkRTConf.cpp',
 
     #mac
-    '<(skia_include_path)/utils/mac/SkCGUtils.h',
-    '<(skia_src_path)/utils/mac/SkCreateCGImageRef.cpp',
     '<(skia_src_path)/utils/mac/SkStream_mac.cpp',
 
     #windows
-    '<(skia_include_path)/utils/win/SkAutoCoInitialize.h',
-    '<(skia_include_path)/utils/win/SkHRESULT.h',
-    '<(skia_include_path)/utils/win/SkIStream.h',
-    '<(skia_include_path)/utils/win/SkTScopedComPtr.h',
-    '<(skia_src_path)/utils/win/SkAutoCoInitialize.cpp',
-    '<(skia_src_path)/utils/win/SkDWrite.h',
-    '<(skia_src_path)/utils/win/SkDWrite.cpp',
-    '<(skia_src_path)/utils/win/SkDWriteFontFileStream.cpp',
-    '<(skia_src_path)/utils/win/SkDWriteFontFileStream.h',
-    '<(skia_src_path)/utils/win/SkDWriteGeometrySink.cpp',
-    '<(skia_src_path)/utils/win/SkDWriteGeometrySink.h',
-    '<(skia_src_path)/utils/win/SkHRESULT.cpp',
-    '<(skia_src_path)/utils/win/SkIStream.cpp',
-    '<(skia_src_path)/utils/win/SkWGL_win.cpp',
 
     #testing
     '<(skia_src_path)/fonts/SkGScalerContext.cpp',
     '<(skia_src_path)/fonts/SkGScalerContext.h',
   ],
 }