Convert a bunch of actions to smart pointers, and also bring PrintParserCallbacks a bit more in line with reality.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67029 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/MinimalAction.cpp b/lib/Parse/MinimalAction.cpp
index 41ad36c..fbda832 100644
--- a/lib/Parse/MinimalAction.cpp
+++ b/lib/Parse/MinimalAction.cpp
@@ -19,7 +19,7 @@
 #include "llvm/Support/raw_ostream.h"
 using namespace clang;
 
-///  Out-of-line virtual destructor to provide home for Action class.
+///  Out-of-line virtual destructor to provide home for ActionBase class.
 ActionBase::~ActionBase() {}
 
 ///  Out-of-line virtual destructor to provide home for Action class.