Disable direction pre-caching to suss out TSAN failures.

src/core/SkRecords.h

Index: src/core/SkRecords.h
diff --git a/src/core/SkRecords.h b/src/core/SkRecords.h
index 183c64776c7d77c9357e239b54215f96c458a055..2ce963367a75798db82f37cf146d3c16d3a329ae 100644
--- a/src/core/SkRecords.h
+++ b/src/core/SkRecords.h
@@ -216,8 +216,10 @@ struct PreCachedPath : public SkPath {
     PreCachedPath() {}
     explicit PreCachedPath(const SkPath& path) : SkPath(path) {
         this->updateBoundsCache();
+#if 0  // Disabled to see if we ever really race on this.  It costs time, chromium:496982.
         SkPathPriv::FirstDirection junk;
         (void)SkPathPriv::CheapComputeFirstDirection(*this, &junk);
+#endif
     }
 };