Convert some more actions to smart pointers.
No performance regression in my basic test.
Also fixed a type error in ActOnFinishSwitchStmt's arguments (body is a stmt).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@62032 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed