Add experimental.alarms API to allow lazy background pages to

chrome/browser/extensions/api/alarms/alarms_api.cc

+// Copyright (c) 2011 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/browser/extensions/api/alarms/alarms_api.h"
+
+#include "base/bind.h"
+#include "base/json/json_writer.h"
+#include "base/values.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/extensions/extension_event_router.h"
+#include "chrome/browser/extensions/extension_service.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/profiles/profile_manager.h"
+#include "chrome/common/extensions/api/experimental.alarms.h"
+
+namespace Alarms = extensions::api::experimental_alarms;
+
+namespace {
+
+const char kOnAlarmEvent[] = "experimental.alarms.onAlarm";
+const char kDefaultAlarmName[] = "";
+
+void AlarmCallback(Profile* profile, const std::string& extension_id) {
+  // The profile could have gone away before this task was run.
+  if (!g_browser_process->profile_manager()->IsValidProfile(profile))
+    return;
+
+  ListValue args;
+  std::string json_args;
+  args.Append(base::Value::CreateStringValue(kDefaultAlarmName));
+  base::JSONWriter::Write(&args, &json_args);
+  profile->GetExtensionEventRouter()->DispatchEventToExtension(
+      extension_id, kOnAlarmEvent, json_args, NULL, GURL());
+}
+
+}
+
+bool AlarmsCreateFunction::RunImpl() {
+  scoped_ptr<Alarms::Create::Params> params(
+      Alarms::Create::Params::Create(*args_));
+  EXTENSION_FUNCTION_VALIDATE(params.get());
+
+  // TODO(mpcomplete): Better handling of granularity. Introduce an alarm
+  // manager that dispatches alarms in batches, and can also cancel previous
+  // alarms. Handle the "name" parameter.
+  // http://crbug.com/81758
+  MessageLoop::current()->PostDelayedTask(FROM_HERE,
+      base::Bind(&AlarmCallback, profile(), extension_id()),
+      params->alarm_info.delay_in_seconds * 1000);
+
+  return true;
+}
+
+bool AlarmsGetFunction::RunImpl() {
+  error_ = "Not implemented.";
+  return false;
+}
+
+bool AlarmsGetAllFunction::RunImpl() {
+  error_ = "Not implemented.";
+  return false;
+}
+
+bool AlarmsClearFunction::RunImpl() {
+  error_ = "Not implemented.";
+  return false;
+}
+
+bool AlarmsClearAllFunction::RunImpl() {
+  error_ = "Not implemented.";
+  return false;
+}