Expose server cq for polling incoming anonymous rpcs

include/grpc++/server.h

@@ -70,6 +70,8 @@ class Server GRPC_FINAL : private CallHook,
   // function to ever return)
   void Wait();
 
+  CompletionQueue* cq() { return &cq_; }
+
  private:
   friend class AnonymousService;
   friend class ServerBuilder;

src/cpp/server/server.cc

@@ -355,10 +355,8 @@ class Server::AsyncRequest GRPC_FINAL : public CompletionQueueTag {
                 array_.metadata[i].value + array_.metadata[i].value_length)));
       }
       if (anonymous_ctx_) {
-        anonymous_ctx_->method_.assign(call_details_.method,
+        anonymous_ctx_->method_ = call_details_.method;
-                                       call_details_.method_capacity);
+        anonymous_ctx_->host_ = call_details_.host;
-        anonymous_ctx_->host_.assign(call_details_.host,
-                                     call_details_.host_capacity);
       }
     }
     ctx->call_ = call_;