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

src/third_party/llvm-project/clang/test/Parser/check-objc2-syntax-1.m

diff --git a/src/third_party/llvm-project/clang/test/Parser/check-objc2-syntax-1.m b/src/third_party/llvm-project/clang/test/Parser/check-objc2-syntax-1.m
new file mode 100644
index 0000000..364f826
--- /dev/null
+++ b/src/third_party/llvm-project/clang/test/Parser/check-objc2-syntax-1.m
@@ -0,0 +1,13 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+
+// rdar://15505492
+@import Foundation; // expected-error {{use of '@import' when modules are disabled}}
+
+@interface Subclass 
++ (int)magicNumber;
+@end
+
+int main (void) {
+  return Subclass.magicNumber;
+}
+