Rename GRState to ProgramState, and cleanup some code formatting along the way.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@137665 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/StaticAnalyzer/Checkers/UndefResultChecker.cpp b/lib/StaticAnalyzer/Checkers/UndefResultChecker.cpp
index 7fa3804..d8c6026 100644
--- a/lib/StaticAnalyzer/Checkers/UndefResultChecker.cpp
+++ b/lib/StaticAnalyzer/Checkers/UndefResultChecker.cpp
@@ -35,7 +35,7 @@
 
 void UndefResultChecker::checkPostStmt(const BinaryOperator *B,
                                        CheckerContext &C) const {
-  const GRState *state = C.getState();
+  const ProgramState *state = C.getState();
   if (state->getSVal(B).isUndef()) {
     // Generate an error node.
     ExplodedNode *N = C.generateSink();