add guard for skia-review.googlesource.com/145823

There ought to be one small layout test diff,
https://test-results.appspot.com/data/layout_results/linux_trusty_blink_rel/34136/layout-test-results/results.html

Change-Id: I3468dff4ae22a7ea9b9d38b7e3896b33f65b7666
Reviewed-on: https://chromium-review.googlesource.com/1165831Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Mike Klein <mtklein@chromium.org>
Cr-Commit-Position: refs/heads/master@{#581357}

skia/config/SkUserConfig.h

@@ -197,6 +197,8 @@ SK_API void SkDebugf_FileLine(const char* file, int line, bool fatal,
 #define SK_SUPPORT_LEGACY_AAA_CHOICE
 #endif
 
+#define SK_LEGACY_COLORSPACE_XFORMER_IMPL
+
 ///////////////////////// Imported from BUILD.gn and skia_common.gypi
 
 /* In some places Skia can use static initializers for global initialization,