I cannot remember what the race here actually was.

include/core/SkDynamicAnnotations.h

Index: include/core/SkDynamicAnnotations.h
diff --git a/include/core/SkDynamicAnnotations.h b/include/core/SkDynamicAnnotations.h
index e7710307f5532589a09b1f56d9b976cfdc373de7..108dd10f9c8798e0061d1bba9a50677118854b9c 100644
--- a/include/core/SkDynamicAnnotations.h
+++ b/include/core/SkDynamicAnnotations.h
@@ -66,23 +66,4 @@ void SK_ANNOTATE_BENIGN_RACE(T* ptr) {
 
 #endif
 
-// Can be used to wrap values that are intentionally racy, usually small mutable cached values, e.g.
-//   - SkMatrix type mask
-//   - SkPixelRef genIDs
-template <typename T>
-class SkTRacy {
-public:
-    operator const T() const {
-        return SK_ANNOTATE_UNPROTECTED_READ(fVal);
-    }
-
-    SkTRacy& operator=(const T& val) {
-        SK_ANNOTATE_UNPROTECTED_WRITE(&fVal, val);
-        return *this;
-    }
-
-private:
-    T fVal;
-};
-
 #endif//SkDynamicAnnotations_DEFINED