Move some helpers from the global namespace into anonymous ones.

llvm-svn: 344468
diff --git a/clang/lib/StaticAnalyzer/Checkers/ExprInspectionChecker.cpp b/clang/lib/StaticAnalyzer/Checkers/ExprInspectionChecker.cpp
index 7c53b2d..0752dba 100644
--- a/clang/lib/StaticAnalyzer/Checkers/ExprInspectionChecker.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/ExprInspectionChecker.cpp
@@ -337,6 +337,7 @@
   C.addTransition(C.getState()->set<DenotedSymbols>(Sym, E));
 }
 
+namespace {
 class SymbolExpressor
     : public SymExprVisitor<SymbolExpressor, Optional<std::string>> {
   ProgramStateRef State;
@@ -369,6 +370,7 @@
     return None;
   }
 };
+} // namespace
 
 void ExprInspectionChecker::analyzerExpress(const CallExpr *CE,
                                             CheckerContext &C) const {