Add a utility method.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@96471 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/Analysis/AnalysisContext.h b/include/clang/Analysis/AnalysisContext.h
index ea4f5b2..bde4417 100644
--- a/include/clang/Analysis/AnalysisContext.h
+++ b/include/clang/Analysis/AnalysisContext.h
@@ -110,6 +110,8 @@
 
   const LocationContext *getParent() const { return Parent; }
 
+  bool isParentOf(const LocationContext *LC) const;
+
   const Decl *getDecl() const { return getAnalysisContext()->getDecl(); }
 
   CFG *getCFG() const { return getAnalysisContext()->getCFG(); }