Drop the ASTContext.h include from DeclFriend.h and DeclTemplate.h.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@159723 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/ARCMigrate/TransUnusedInitDelegate.cpp b/lib/ARCMigrate/TransUnusedInitDelegate.cpp
index 7a825e8..3057e39 100644
--- a/lib/ARCMigrate/TransUnusedInitDelegate.cpp
+++ b/lib/ARCMigrate/TransUnusedInitDelegate.cpp
@@ -22,6 +22,7 @@
 
 #include "Transforms.h"
 #include "Internals.h"
+#include "clang/AST/ASTContext.h"
 #include "clang/Sema/SemaDiagnostic.h"
 
 using namespace clang;