[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)?

llvm-svn: 142946
diff --git a/clang/lib/StaticAnalyzer/Checkers/NSErrorChecker.cpp b/clang/lib/StaticAnalyzer/Checkers/NSErrorChecker.cpp
index 5678998..92702eb 100644
--- a/clang/lib/StaticAnalyzer/Checkers/NSErrorChecker.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/NSErrorChecker.cpp
@@ -193,7 +193,7 @@
 static void setFlag(const ProgramState *state, SVal val, CheckerContext &C) {
   // We tag the symbol that the SVal wraps.
   if (SymbolRef sym = val.getAsSymbol())
-    C.addTransition(state->set<T>(sym, true));
+    C.generateNode(state->set<T>(sym, true));
 }
 
 static QualType parameterTypeFromSVal(SVal val, CheckerContext &C) {