MemRegion can refer to ASTContext without external help.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@110784 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Checker/ValueManager.cpp b/lib/Checker/ValueManager.cpp
index aa0c3c8..5cfc4a9 100644
--- a/lib/Checker/ValueManager.cpp
+++ b/lib/Checker/ValueManager.cpp
@@ -72,7 +72,7 @@
 
 DefinedOrUnknownSVal 
 ValueManager::getRegionValueSymbolVal(const TypedRegion* R) {
-  QualType T = R->getValueType(SymMgr.getContext());
+  QualType T = R->getValueType();
 
   if (!SymbolManager::canSymbolicate(T))
     return UnknownVal();
@@ -121,7 +121,7 @@
 DefinedOrUnknownSVal
 ValueManager::getDerivedRegionValueSymbolVal(SymbolRef parentSymbol,
                                              const TypedRegion *R) {
-  QualType T = R->getValueType(R->getContext());
+  QualType T = R->getValueType();
 
   if (!SymbolManager::canSymbolicate(T))
     return UnknownVal();