Pull TypeLocVisitor into its own header file.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@83112 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/PCHWriterDecl.cpp b/lib/Frontend/PCHWriterDecl.cpp
index 9573d43..4527bb1 100644
--- a/lib/Frontend/PCHWriterDecl.cpp
+++ b/lib/Frontend/PCHWriterDecl.cpp
@@ -14,7 +14,7 @@
 #include "clang/Frontend/PCHWriter.h"
 #include "clang/AST/DeclVisitor.h"
 #include "clang/AST/Expr.h"
-#include "clang/AST/TypeLoc.h"
+#include "clang/AST/TypeLocVisitor.h"
 #include "llvm/Bitcode/BitstreamWriter.h"
 #include <cstdio>