Rename DiagnosticInfo to Diagnostic as per issue 5397


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@140493 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/unittests/AST/APValueTest.cpp b/unittests/AST/APValueTest.cpp
index 44ad8cc..98cb086 100644
--- a/unittests/AST/APValueTest.cpp
+++ b/unittests/AST/APValueTest.cpp
@@ -25,7 +25,7 @@
     SmallString<64> LastDiagnostic;
   public:
     virtual void HandleDiagnostic(DiagnosticsEngine::Level DiagLevel,
-                                  const DiagnosticInfo &Info) {
+                                  const Diagnostic &Info) {
       LastDiagnostic.clear();
       Info.FormatDiagnostic(LastDiagnostic);
     }