Add texture compression utility

gyp/utils.gypi

 # Include this gypi to include all 'utils' files
 # The parent gyp/gypi file must define
 #       'skia_src_path'     e.g. skia/trunk/src
 #       'skia_include_path' e.g. skia/trunk/include
 #
 # The skia build defines these in common_variables.gypi
 #
 {
     'sources': [
         # Classes for a threadpool.
@@ skipping 65 matching lines @@
         '<(skia_src_path)/utils/SkOSFile.cpp',
         '<(skia_src_path)/utils/SkParse.cpp',
         '<(skia_src_path)/utils/SkParseColor.cpp',
         '<(skia_src_path)/utils/SkParsePath.cpp',
         '<(skia_src_path)/utils/SkPictureUtils.cpp',
         '<(skia_src_path)/utils/SkPathUtils.cpp',
         '<(skia_src_path)/utils/SkProxyCanvas.cpp',
         '<(skia_src_path)/utils/SkSHA1.cpp',
         '<(skia_src_path)/utils/SkSHA1.h',
         '<(skia_src_path)/utils/SkRTConf.cpp',
+        '<(skia_src_path)/utils/SkTextureCompressor.cpp',
+        '<(skia_src_path)/utils/SkTextureCompressor.h',
         '<(skia_src_path)/utils/SkThreadUtils.h',
         '<(skia_src_path)/utils/SkThreadUtils_pthread.cpp',
         '<(skia_src_path)/utils/SkThreadUtils_pthread.h',
         '<(skia_src_path)/utils/SkThreadUtils_pthread_linux.cpp',
         '<(skia_src_path)/utils/SkThreadUtils_pthread_mach.cpp',
         '<(skia_src_path)/utils/SkThreadUtils_pthread_other.cpp',
         '<(skia_src_path)/utils/SkThreadUtils_win.cpp',
         '<(skia_src_path)/utils/SkThreadUtils_win.h',
         '<(skia_src_path)/utils/SkTFitsIn.h',
         '<(skia_src_path)/utils/SkTLogic.h',
@@ skipping 16 matching lines @@
         '<(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',
     ],
 }