Refactor texture compressors into separate files

R=robertphillips@google.com

Author: krajcevski@google.com

Review URL: https://codereview.chromium.org/403383003
diff --git a/gyp/utils.gypi b/gyp/utils.gypi
index 52cc154..9efa280 100644
--- a/gyp/utils.gypi
+++ b/gyp/utils.gypi
@@ -85,6 +85,10 @@
         '<(skia_src_path)/utils/SkRTConf.cpp',
         '<(skia_src_path)/utils/SkTextureCompressor.cpp',
         '<(skia_src_path)/utils/SkTextureCompressor.h',
+        '<(skia_src_path)/utils/SkTextureCompressor_R11EAC.cpp',
+        '<(skia_src_path)/utils/SkTextureCompressor_R11EAC.h',
+        '<(skia_src_path)/utils/SkTextureCompressor_LATC.cpp',
+        '<(skia_src_path)/utils/SkTextureCompressor_LATC.h',
         '<(skia_src_path)/utils/SkThreadUtils.h',
         '<(skia_src_path)/utils/SkThreadUtils_pthread.cpp',
         '<(skia_src_path)/utils/SkThreadUtils_pthread.h',