[analyzer] Simplify CheckerContext

Remove dead members/parameters: ProgramState, respondsToCallback, autoTransition.
Remove addTransition method since it's the same as generateNode. Maybe we should
rename generateNode to genTransition (since a transition is always automatically
generated)?

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@142946 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/StaticAnalyzer/Checkers/ChrootChecker.cpp b/lib/StaticAnalyzer/Checkers/ChrootChecker.cpp
index 3c92381..769a93e 100644
--- a/lib/StaticAnalyzer/Checkers/ChrootChecker.cpp
+++ b/lib/StaticAnalyzer/Checkers/ChrootChecker.cpp
@@ -94,7 +94,7 @@
   // Once encouter a chroot(), set the enum value ROOT_CHANGED directly in 
   // the GDM.
   state = Mgr.addGDM(state, ChrootChecker::getTag(), (void*) ROOT_CHANGED);
-  C.addTransition(state);
+  C.generateNode(state);
 }
 
 void ChrootChecker::Chdir(CheckerContext &C, const CallExpr *CE) const {
@@ -120,7 +120,7 @@
     }
   }
 
-  C.addTransition(state);
+  C.generateNode(state);
 }
 
 // Check the jail state before any function call except chroot and chdir().