Lose redundant tag on unary calls
diff --git a/test/cpp/end2end/async_end2end_test.cc b/test/cpp/end2end/async_end2end_test.cc
index 6c0dfad..4c2f0fa 100644
--- a/test/cpp/end2end/async_end2end_test.cc
+++ b/test/cpp/end2end/async_end2end_test.cc
@@ -140,14 +140,13 @@
 
       send_request.set_message("Hello");
       std::unique_ptr<ClientAsyncResponseReader<EchoResponse> > response_reader(
-          stub_->AsyncEcho(&cli_ctx, send_request, &cli_cq_, tag(1)));
+          stub_->AsyncEcho(&cli_ctx, send_request, &cli_cq_));
 
       service_.RequestEcho(&srv_ctx, &recv_request, &response_writer, &srv_cq_,
                            tag(2));
 
       server_ok(2);
       EXPECT_EQ(send_request.message(), recv_request.message());
-      client_ok(1);
 
       send_response.set_message(recv_request.message());
       response_writer.Finish(send_response, Status::OK, tag(3));
@@ -195,7 +194,7 @@
 
   send_request.set_message("Hello");
   std::unique_ptr<ClientAsyncResponseReader<EchoResponse> > response_reader(
-      stub_->AsyncEcho(&cli_ctx, send_request, &cli_cq_, tag(1)));
+      stub_->AsyncEcho(&cli_ctx, send_request, &cli_cq_));
 
   std::chrono::system_clock::time_point time_now(
       std::chrono::system_clock::now()),
@@ -208,7 +207,6 @@
 
   verify_timed_ok(&srv_cq_, 2, true, time_limit);
   EXPECT_EQ(send_request.message(), recv_request.message());
-  verify_timed_ok(&cli_cq_, 1, true, time_limit);
 
   send_response.set_message(recv_request.message());
   response_writer.Finish(send_response, Status::OK, tag(3));
@@ -398,7 +396,7 @@
   cli_ctx.AddMetadata(meta2.first, meta2.second);
 
   std::unique_ptr<ClientAsyncResponseReader<EchoResponse> > response_reader(
-      stub_->AsyncEcho(&cli_ctx, send_request, &cli_cq_, tag(1)));
+      stub_->AsyncEcho(&cli_ctx, send_request, &cli_cq_));
 
   service_.RequestEcho(&srv_ctx, &recv_request, &response_writer, &srv_cq_,
                        tag(2));
@@ -408,7 +406,6 @@
   EXPECT_EQ(meta1.second, client_initial_metadata.find(meta1.first)->second);
   EXPECT_EQ(meta2.second, client_initial_metadata.find(meta2.first)->second);
   EXPECT_EQ(static_cast<size_t>(2), client_initial_metadata.size());
-  client_ok(1);
 
   send_response.set_message(recv_request.message());
   response_writer.Finish(send_response, Status::OK, tag(3));
@@ -440,7 +437,7 @@
   std::pair<grpc::string, grpc::string> meta2("key2", "val2");
 
   std::unique_ptr<ClientAsyncResponseReader<EchoResponse> > response_reader(
-      stub_->AsyncEcho(&cli_ctx, send_request, &cli_cq_, tag(1)));
+      stub_->AsyncEcho(&cli_ctx, send_request, &cli_cq_));
 
   service_.RequestEcho(&srv_ctx, &recv_request, &response_writer, &srv_cq_,
                        tag(2));
@@ -448,7 +445,6 @@
   EXPECT_EQ(send_request.message(), recv_request.message());
   srv_ctx.AddInitialMetadata(meta1.first, meta1.second);
   srv_ctx.AddInitialMetadata(meta2.first, meta2.second);
-  client_ok(1);
   response_writer.SendInitialMetadata(tag(3));
   server_ok(3);
 
@@ -488,7 +484,7 @@
   std::pair<grpc::string, grpc::string> meta2("key2", "val2");
 
   std::unique_ptr<ClientAsyncResponseReader<EchoResponse> > response_reader(
-      stub_->AsyncEcho(&cli_ctx, send_request, &cli_cq_, tag(1)));
+      stub_->AsyncEcho(&cli_ctx, send_request, &cli_cq_));
 
   service_.RequestEcho(&srv_ctx, &recv_request, &response_writer, &srv_cq_,
                        tag(2));
@@ -496,7 +492,6 @@
   EXPECT_EQ(send_request.message(), recv_request.message());
   response_writer.SendInitialMetadata(tag(3));
   server_ok(3);
-  client_ok(1);
 
   send_response.set_message(recv_request.message());
   srv_ctx.AddTrailingMetadata(meta1.first, meta1.second);
@@ -549,7 +544,7 @@
   cli_ctx.AddMetadata(meta2.first, meta2.second);
 
   std::unique_ptr<ClientAsyncResponseReader<EchoResponse> > response_reader(
-      stub_->AsyncEcho(&cli_ctx, send_request, &cli_cq_, tag(1)));
+      stub_->AsyncEcho(&cli_ctx, send_request, &cli_cq_));
 
   service_.RequestEcho(&srv_ctx, &recv_request, &response_writer, &srv_cq_,
                        tag(2));
diff --git a/test/cpp/qps/client_async.cc b/test/cpp/qps/client_async.cc
index 0aec1b1..e3ab577 100644
--- a/test/cpp/qps/client_async.cc
+++ b/test/cpp/qps/client_async.cc
@@ -75,19 +75,20 @@
       TestService::Stub* stub, const RequestType& req,
       std::function<
           std::unique_ptr<grpc::ClientAsyncResponseReader<ResponseType>>(
-              TestService::Stub*, grpc::ClientContext*, const RequestType&,
-              void*)> start_req,
+              TestService::Stub*, grpc::ClientContext*, const RequestType&)>
+          start_req,
       std::function<void(grpc::Status, ResponseType*)> on_done)
       : context_(),
         stub_(stub),
         req_(req),
         response_(),
-        next_state_(&ClientRpcContextUnaryImpl::ReqSent),
+        next_state_(&ClientRpcContextUnaryImpl::RespDone),
         callback_(on_done),
         start_req_(start_req),
         start_(Timer::Now()),
-        response_reader_(
-            start_req(stub_, &context_, req_, ClientRpcContext::tag(this))) {}
+        response_reader_(start_req(stub_, &context_, req_)) {
+    response_reader_->Finish(&response_, &status_, ClientRpcContext::tag(this));
+  }
   ~ClientRpcContextUnaryImpl() GRPC_OVERRIDE {}
   bool RunNextState(bool ok, Histogram* hist) GRPC_OVERRIDE {
     bool ret = (this->*next_state_)(ok);
@@ -102,11 +103,6 @@
   }
 
  private:
-  bool ReqSent(bool) {
-    next_state_ = &ClientRpcContextUnaryImpl::RespDone;
-    response_reader_->Finish(&response_, &status_, ClientRpcContext::tag(this));
-    return true;
-  }
   bool RespDone(bool) {
     next_state_ = &ClientRpcContextUnaryImpl::DoCallBack;
     return false;
@@ -122,8 +118,7 @@
   bool (ClientRpcContextUnaryImpl::*next_state_)(bool);
   std::function<void(grpc::Status, ResponseType*)> callback_;
   std::function<std::unique_ptr<grpc::ClientAsyncResponseReader<ResponseType>>(
-      TestService::Stub*, grpc::ClientContext*, const RequestType&, void*)>
-      start_req_;
+      TestService::Stub*, grpc::ClientContext*, const RequestType&)> start_req_;
   grpc::Status status_;
   double start_;
   std::unique_ptr<grpc::ClientAsyncResponseReader<ResponseType>>
@@ -198,8 +193,8 @@
                        const SimpleRequest& req) {
     auto check_done = [](grpc::Status s, SimpleResponse* response) {};
     auto start_req = [cq](TestService::Stub* stub, grpc::ClientContext* ctx,
-                          const SimpleRequest& request, void* tag) {
-      return stub->AsyncUnaryCall(ctx, request, cq, tag);
+                          const SimpleRequest& request) {
+      return stub->AsyncUnaryCall(ctx, request, cq);
     };
     new ClientRpcContextUnaryImpl<SimpleRequest, SimpleResponse>(
         stub, req, start_req, check_done);