Some renames to use the 'visitor' nomenclature, no functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165083 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/libclang/Indexing.cpp b/tools/libclang/Indexing.cpp
index 598dbce..6b9abbc 100644
--- a/tools/libclang/Indexing.cpp
+++ b/tools/libclang/Indexing.cpp
@@ -472,7 +472,7 @@
   }
 }
 
-static bool topLevelDeclReceiver(void *context, const Decl *D) {
+static bool topLevelDeclVisitor(void *context, const Decl *D) {
   IndexingContext &IdxCtx = *static_cast<IndexingContext*>(context);
   IdxCtx.indexTopLevelDecl(D);
   if (IdxCtx.shouldAbort())
@@ -481,7 +481,7 @@
 }
 
 static void indexTranslationUnit(ASTUnit &Unit, IndexingContext &IdxCtx) {
-  Unit.applyOnLocalTopLevelDecls(&IdxCtx, topLevelDeclReceiver);
+  Unit.visitLocalTopLevelDecls(&IdxCtx, topLevelDeclVisitor);
 }
 
 static void indexDiagnostics(CXTranslationUnit TU, IndexingContext &IdxCtx) {