n-api: take n-api out of experimental

Take n-api out of experimental as per:
nodejs/TSC#501

PR-URL: #19262
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>

doc/api/n-api.md

@@ -2,7 +2,7 @@

<!--introduced_in=v7.10.0-->

> Stability: 1 - Experimental
> Stability: 2 - Stable

N-API (pronounced N as in the letter, followed by API)
is an API for building native Addons. It is independent from

src/env.cc

@@ -95,7 +95,6 @@ Environment::Environment(IsolateData* isolate_data,
      printed_error_(false),
      trace_sync_io_(false),
      abort_on_uncaught_exception_(false),
      emit_napi_warning_(true),
      emit_env_nonstring_warning_(true),
      makecallback_cntr_(0),
      should_abort_on_uncaught_toggle_(isolate_, 1),
@@ -350,12 +349,6 @@ bool Environment::RemovePromiseHook(promise_hook_func fn, void* arg) {
  return true;
}

bool Environment::EmitNapiWarning() {
  bool current_value = emit_napi_warning_;
  emit_napi_warning_ = false;
  return current_value;
}

void Environment::EnvPromiseHook(v8::PromiseHookType type,
                                 v8::Local<v8::Promise> promise,
                                 v8::Local<v8::Value> parent) {

src/env.h

@@ -725,7 +725,6 @@ class Environment {

  void AddPromiseHook(promise_hook_func fn, void* arg);
  bool RemovePromiseHook(promise_hook_func fn, void* arg);
  bool EmitNapiWarning();
  inline bool EmitProcessEnvWarning() {
    bool current_value = emit_env_nonstring_warning_;
    emit_env_nonstring_warning_ = false;
@@ -784,7 +783,6 @@ class Environment {
  bool printed_error_;
  bool trace_sync_io_;
  bool abort_on_uncaught_exception_;
  bool emit_napi_warning_;
  bool emit_env_nonstring_warning_;
  size_t makecallback_cntr_;
  std::vector<double> destroy_async_id_list_;

src/node.cc

@@ -2286,15 +2286,8 @@ static void DLOpen(const FunctionCallbackInfo<Value>& args) {
    return;
  }

  if (mp->nm_version == -1) {
    if (env->EmitNapiWarning()) {
      if (ProcessEmitWarning(env, "N-API is an experimental feature and could "
                                  "change at any time.").IsNothing()) {
        dlib.Close();
        return;
      }
    }
  } else if (mp->nm_version != NODE_MODULE_VERSION) {
  // -1 is used for N-API modules
  if ((mp->nm_version != -1) && (mp->nm_version != NODE_MODULE_VERSION)) {
    char errmsg[1024];
    snprintf(errmsg,
             sizeof(errmsg),

src/node_api.cc

@@ -1,13 +1,3 @@
/******************************************************************************
 * Experimental prototype for demonstrating VM agnostic and ABI stable API
 * for native modules to use instead of using Nan and V8 APIs directly.
 *
 * The current status is "Experimental" and should not be used for
 * production applications.  The API is still subject to change
 * and as an experimental feature is NOT subject to semver.
 *
 ******************************************************************************/

#include <node_buffer.h>
#include <node_object_wrap.h>
#include <limits.h>  // INT_MAX

src/node_api.h

@@ -1,12 +1,3 @@
/******************************************************************************
 * Experimental prototype for demonstrating VM agnostic and ABI stable API
 * for native modules to use instead of using Nan and V8 APIs directly.
 *
 * The current status is "Experimental" and should not be used for
 * production applications.  The API is still subject to change
 * and as an experimental feature is NOT subject to semver.
 *
 ******************************************************************************/
#ifndef SRC_NODE_API_H_
#define SRC_NODE_API_H_