[build] Fix GRPC_POLL_STRATEGY=none on non bazel builds (#30109)

* fix

* fix

src/core/lib/iomgr/ev_poll_posix.cc

@@ -1418,4 +1418,38 @@ const grpc_event_engine_vtable grpc_ev_poll_posix = {
     add_closure_to_background_poller,
 };
 
+namespace {
+
+grpc_poll_function_type real_poll_function;
+
+int phony_poll(struct pollfd fds[], nfds_t nfds, int timeout) {
+  if (timeout == 0) {
+    return real_poll_function(fds, nfds, 0);
+  } else {
+    gpr_log(GPR_ERROR, "Attempted a blocking poll when declared non-polling.");
+    GPR_ASSERT(false);
+    return -1;
+  }
+}
+
+}  // namespace
+
+const grpc_event_engine_vtable grpc_ev_none_posix = []() {
+  grpc_event_engine_vtable v = grpc_ev_poll_posix;
+  v.check_engine_available = [](bool explicit_request) {
+    if (!explicit_request) return false;
+    // return the simplest engine as a phony but also override the poller
+    if (!grpc_ev_poll_posix.check_engine_available(explicit_request)) {
+      return false;
+    }
+    real_poll_function = grpc_poll_function;
+    grpc_poll_function = phony_poll;
+    return true;
+  };
+  v.name = "none";
+  v.init_engine = []() {};
+  v.shutdown_engine = []() {};
+  return v;
+}();
+
 #endif /* GRPC_POSIX_SOCKET_EV_POLL */

src/core/lib/iomgr/ev_poll_posix.h

@@ -24,5 +24,6 @@
 #include "src/core/lib/iomgr/ev_posix.h"
 
 extern const grpc_event_engine_vtable grpc_ev_poll_posix;
+extern const grpc_event_engine_vtable grpc_ev_none_posix;
 
 #endif /* GRPC_CORE_LIB_IOMGR_EV_POLL_POSIX_H */

src/core/lib/iomgr/ev_posix.cc

@@ -78,40 +78,6 @@ grpc_wakeup_fd grpc_global_wakeup_fd;
 static const grpc_event_engine_vtable* g_event_engine = nullptr;
 static gpr_once g_choose_engine = GPR_ONCE_INIT;
 
-namespace {
-
-grpc_poll_function_type real_poll_function;
-
-int phony_poll(struct pollfd fds[], nfds_t nfds, int timeout) {
-  if (timeout == 0) {
-    return real_poll_function(fds, nfds, 0);
-  } else {
-    gpr_log(GPR_ERROR, "Attempted a blocking poll when declared non-polling.");
-    GPR_ASSERT(false);
-    return -1;
-  }
-}
-
-const grpc_event_engine_vtable* non_polling() {
-  static const grpc_event_engine_vtable vtable = []() {
-    grpc_event_engine_vtable v = grpc_ev_poll_posix;
-    v.check_engine_available = [](bool explicit_request) {
-      if (!explicit_request) return false;
-      // return the simplest engine as a phony but also override the poller
-      if (!grpc_ev_poll_posix.check_engine_available(explicit_request)) {
-        return false;
-      }
-      real_poll_function = grpc_poll_function;
-      grpc_poll_function = phony_poll;
-      return true;
-    };
-    v.name = "none";
-    return v;
-  }();
-  return &vtable;
-}
-}  // namespace
-
 // The global array of event-engine factories. Each entry is a pair with a name
 // and an event-engine generator function (nullptr if there is no generator
 // registered for this name). The middle entries are the engines predefined by
@@ -130,7 +96,7 @@ static const grpc_event_engine_vtable* g_vtables[] = {
     nullptr,
     &grpc_ev_epoll1_posix,
     &grpc_ev_poll_posix,
-    non_polling(),
+    &grpc_ev_none_posix,
     nullptr,
     nullptr,
     nullptr,