Lazy load chrome.* APIs

chrome/renderer/extensions/native_handler.cc

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "chrome/renderer/extensions/native_handler.h"
-
-#include "base/memory/linked_ptr.h"
-#include "base/logging.h"
-#include "chrome/renderer/extensions/module_system.h"
-#include "v8/include/v8.h"
-
-namespace extensions {
-
-NativeHandler::NativeHandler()
-    : object_template_(
-        v8::Persistent<v8::ObjectTemplate>::New(v8::ObjectTemplate::New())) {
-}
-
-NativeHandler::~NativeHandler() {
-  object_template_.Dispose();
-}
-
-v8::Handle<v8::Object> NativeHandler::NewInstance() {
-  return object_template_->NewInstance();
-}
-
-// static
-v8::Handle<v8::Value> NativeHandler::Router(const v8::Arguments& args) {
-  // It is possible for JS code to execute after ModuleSystem has been deleted
-  // in which case the native handlers will also have been deleted, making
-  // HandlerFunction below point to freed memory.
-  if (!ModuleSystem::IsPresentInCurrentContext()) {
-    return v8::ThrowException(v8::Exception::Error(
-        v8::String::New("ModuleSystem has been deleted")));
-  }
-  HandlerFunction* handler_function = static_cast<HandlerFunction*>(
-      args.Data().As<v8::External>()->Value());
-  return handler_function->Run(args);
-}
-
-void NativeHandler::RouteFunction(const std::string& name,
-    const HandlerFunction& handler_function) {
-  linked_ptr<HandlerFunction> function(new HandlerFunction(handler_function));
-  // TODO(koz): Investigate using v8's MakeWeak() function instead of holding
-  // on to these pointers here.
-  handler_functions_.push_back(function);
-  v8::Handle<v8::FunctionTemplate> function_template =
-      v8::FunctionTemplate::New(Router,
-          v8::External::New(function.get()));
-  object_template_->Set(name.c_str(), function_template);
-}
-
-void NativeHandler::RouteStaticFunction(const std::string& name,
-                                        const HandlerFunc handler_func) {
-  v8::Handle<v8::FunctionTemplate> function_template =
-      v8::FunctionTemplate::New(handler_func, v8::External::New(this));
-  object_template_->Set(name.c_str(), function_template);
-}
-
-}   // extensions