[AST] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC).
llvm-svn: 317854
diff --git a/clang/lib/AST/DeclGroup.cpp b/clang/lib/AST/DeclGroup.cpp
index 2f95e1f..f74ef9b 100644
--- a/clang/lib/AST/DeclGroup.cpp
+++ b/clang/lib/AST/DeclGroup.cpp
@@ -1,4 +1,4 @@
-//===--- DeclGroup.cpp - Classes for representing groups of Decls -*- C++ -*-==//
+//===- DeclGroup.cpp - Classes for representing groups of Decls -----------===//
//
// The LLVM Compiler Infrastructure
//
@@ -13,7 +13,9 @@
#include "clang/AST/DeclGroup.h"
#include "clang/AST/ASTContext.h"
-#include "clang/AST/Decl.h"
+#include <cassert>
+#include <memory>
+
using namespace clang;
DeclGroup* DeclGroup::Create(ASTContext &C, Decl **Decls, unsigned NumDecls) {