Remove ChannelInterface and replace it with Channel
diff --git a/test/cpp/end2end/mock_test.cc b/test/cpp/end2end/mock_test.cc
index 32130e2..96b6ecb 100644
--- a/test/cpp/end2end/mock_test.cc
+++ b/test/cpp/end2end/mock_test.cc
@@ -38,7 +38,7 @@
 #include "test/cpp/util/echo_duplicate.grpc.pb.h"
 #include "test/cpp/util/echo.grpc.pb.h"
 #include <grpc++/channel_arguments.h>
-#include <grpc++/channel_interface.h>
+#include <grpc++/channel.h>
 #include <grpc++/client_context.h>
 #include <grpc++/create_channel.h>
 #include <grpc++/credentials.h>
@@ -251,7 +251,7 @@
   void TearDown() GRPC_OVERRIDE { server_->Shutdown(); }
 
   void ResetStub() {
-    std::shared_ptr<ChannelInterface> channel = CreateChannel(
+    std::shared_ptr<Channel> channel = CreateChannel(
         server_address_.str(), InsecureCredentials(), ChannelArguments());
     stub_ = std::move(grpc::cpp::test::util::TestService::NewStub(channel));
   }