Add skeleton implementation of ExtensionPushMessagingEventRouter.

chrome/browser/extensions/api/push_messaging/push_messaging_api.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/browser/extensions/api/push_messaging/push_messaging_api.h"
+
+#include "base/bind.h"
+#include "base/json/json_writer.h"
+#include "base/values.h"
+#include "chrome/browser/extensions/event_router.h"
+#include "chrome/browser/profiles/profile.h"
+#include "content/public/browser/browser_thread.h"
+#include "googleurl/src/gurl.h"
+
+using content::BrowserThread;
+
+namespace extensions {
+
+namespace {
+const char kEventName[] = "experimental.pushMessaging.onMessage";
+// Keys for JSON dictionary for the onMessage event.
+const char kPayloadKey[] = "payload";
+const char kSubchannelKey[] = "subchannel";
+}  // namespace
+
+ExtensionPushMessagingEventRouter::ExtensionPushMessagingEventRouter(
+    Profile* profile)
+    : profile_(profile) {
+}
+
+ExtensionPushMessagingEventRouter::~ExtensionPushMessagingEventRouter() {}
+
+void ExtensionPushMessagingEventRouter::Init() {
+  // TODO(dcheng): Add hooks into InvalidationHandler when landed.
+}
+
+void ExtensionPushMessagingEventRouter::TriggerMessageForTest(
+    const std::string& extension_id,
+    int subchannel,
+    const std::string& payload) {
+  OnMessage(extension_id, subchannel, payload);
+}
+
+void ExtensionPushMessagingEventRouter::OnMessage(
+    const std::string& extension_id,
+    int subchannel,
+    const std::string& payload) {
+  ListValue args;

[Munjal (Google), 2012/07/31 17:36:12]

Define args closer to its first use; before args.Append(dict);

[dcheng, 2012/07/31 19:04:11]

Done.

+  DictionaryValue* dict = new DictionaryValue;
+  dict->SetInteger(kSubchannelKey, subchannel);
+  dict->SetString(kPayloadKey, payload);
+
+  args.Append(dict);
+
+  std::string json_args;
+  base::JSONWriter::Write(&args, &json_args);
+  profile_->GetExtensionEventRouter()->DispatchEventToExtension(
+        extension_id,

[Munjal (Google), 2012/07/31 17:36:12]

Nit: indentation.

[dcheng, 2012/07/31 19:04:11]

Done.

+        kEventName,
+        json_args,
+        profile_,
+        GURL());
+}
+
+}  // namespace extensions