Import Cobalt 19.master.0.203780

Includes the following patches:
  https://cobalt-review.googlesource.com/c/cobalt/+/5210
    by errong.leng@samsung.com
  https://cobalt-review.googlesource.com/c/cobalt/+/5270
    by linus.wang@samsung.com
diff --git a/src/third_party/llvm-project/clang/test/Rewriter/undeclared-method-1.m b/src/third_party/llvm-project/clang/test/Rewriter/undeclared-method-1.m
new file mode 100644
index 0000000..a52c677
--- /dev/null
+++ b/src/third_party/llvm-project/clang/test/Rewriter/undeclared-method-1.m
@@ -0,0 +1,9 @@
+// RUN: %clang_cc1 -rewrite-objc -fobjc-runtime=macosx-fragile-10.5  %s -o -
+
+@interface Derived @end
+
+int main(void) {
+  Derived *v ;
+  [v free];
+  return 0;
+}