minor SkSL changes to avoid compiler errors in Chromium

src/sksl/ir/SkSLFieldAccess.h

Index: src/sksl/ir/SkSLFieldAccess.h
diff --git a/src/sksl/ir/SkSLFieldAccess.h b/src/sksl/ir/SkSLFieldAccess.h
index bcdd7eea4fbebbf83e3d773623abd00a1e4c9c9a..4be4e9e84c13e1023a83e7aaf31a3a040095c339 100644
--- a/src/sksl/ir/SkSLFieldAccess.h
+++ b/src/sksl/ir/SkSLFieldAccess.h
@@ -26,7 +26,7 @@ struct FieldAccess : public Expression {
 
     FieldAccess(std::unique_ptr<Expression> base, int fieldIndex, 
                 OwnerKind ownerKind = kDefault_OwnerKind)
-    : INHERITED(base->fPosition, kFieldAccess_Kind, base->fType.fields()[fieldIndex].fType)
+    : INHERITED(base->fPosition, kFieldAccess_Kind, *base->fType.fields()[fieldIndex].fType)
     , fBase(std::move(base))
     , fFieldIndex(fieldIndex)
     , fOwnerKind(ownerKind) {}