Refactor Assume logic into a separate class ConstraintManager.

llvm-svn: 55412
diff --git a/clang/lib/Analysis/GRExprEngine.cpp b/clang/lib/Analysis/GRExprEngine.cpp
index a14695d..c92093c 100644
--- a/clang/lib/Analysis/GRExprEngine.cpp
+++ b/clang/lib/Analysis/GRExprEngine.cpp
@@ -121,7 +121,7 @@
     Liveness(L),
     Builder(NULL),
     StateMgr(G.getContext(), CreateBasicStoreManager(G.getAllocator(), Ctx),
-             G.getAllocator(), G.getCFG(), L),
+             CreateBasicConstraintManager, G.getAllocator(), G.getCFG(), L),
     SymMgr(StateMgr.getSymbolManager()),
     CurrentStmt(NULL),
   NSExceptionII(NULL), NSExceptionInstanceRaiseSelectors(NULL),