Move some helpers from the global namespace into anonymous ones.

llvm-svn: 344468
diff --git a/clang/lib/StaticAnalyzer/Checkers/CallAndMessageChecker.cpp b/clang/lib/StaticAnalyzer/Checkers/CallAndMessageChecker.cpp
index 1f9bdeb..3aa21b8 100644
--- a/clang/lib/StaticAnalyzer/Checkers/CallAndMessageChecker.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/CallAndMessageChecker.cpp
@@ -196,6 +196,7 @@
   return false;
 }
 
+namespace {
 class FindUninitializedField {
 public:
   SmallVector<const FieldDecl *, 10> FieldChain;
@@ -234,6 +235,7 @@
     return false;
   }
 };
+} // namespace
 
 bool CallAndMessageChecker::PreVisitProcessArg(CheckerContext &C,
                                                SVal V,