Include pruning and general cleanup.

llvm-svn: 169095
diff --git a/clang/lib/StaticAnalyzer/Checkers/IdempotentOperationChecker.cpp b/clang/lib/StaticAnalyzer/Checkers/IdempotentOperationChecker.cpp
index ffbbb8b..beb93c9 100644
--- a/clang/lib/StaticAnalyzer/Checkers/IdempotentOperationChecker.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/IdempotentOperationChecker.cpp
@@ -60,6 +60,7 @@
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/BitVector.h"
 #include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/raw_ostream.h"
 
 using namespace clang;
 using namespace ento;