Finishing the move of RefactoringCallbacks and fixing the corresponding
buildbot failures.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160355 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/unittests/Tooling/RefactoringCallbacksTest.cpp b/unittests/Tooling/RefactoringCallbacksTest.cpp
index 90d9377..00eb193 100644
--- a/unittests/Tooling/RefactoringCallbacksTest.cpp
+++ b/unittests/Tooling/RefactoringCallbacksTest.cpp
@@ -14,7 +14,9 @@
 #include "RewriterTestContext.h"
 
 namespace clang {
-namespace ast_matchers {
+namespace tooling {
+
+using namespace ast_matchers;
 
 template <typename T>
 void expectRewritten(const std::string &Code,