[libclang] Index C++ namespaces.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146019 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/libclang/IndexDecl.cpp b/tools/libclang/IndexDecl.cpp
index 0970054..84c1134 100644
--- a/tools/libclang/IndexDecl.cpp
+++ b/tools/libclang/IndexDecl.cpp
@@ -189,6 +189,12 @@
     return true;
   }
 
+  bool VisitNamespaceDecl(NamespaceDecl *D) {
+    IndexCtx.handleNamespace(D);
+    IndexCtx.indexDeclContext(D);
+    return true;
+  }
+
   bool VisitClassTemplateDecl(ClassTemplateDecl *D) {
     IndexCtx.handleClassTemplate(D);
     if (D->isThisDeclarationADefinition())