[clang] [llvm] [FlowSensitive] [StatusOr] [1/N] Add mock headers (PR #163261)

[Florian Mayer via llvm-commits]

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@@ -1240,6 +1274,998 @@ constexpr bool operator!=(const T &value, const Optional<U> &opt);
 } // namespace base
 )";
 
+constexpr const char StatusDefsHeader[] =
+    R"cc(
+#ifndef STATUS_H_
+#define STATUS_H_
+
+#include "absl_type_traits.h"
+#include "std_initializer_list.h"
+#include "std_type_traits.h"
+#include "std_utility.h"
+#include "std_string.h"
+
+  namespace absl {
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fmayer wrote:

done

https://github.com/llvm/llvm-project/pull/163261