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";

[Mihai Parparita -not on Chrome, 2012/08/01 20:05:50]

The extensions infrastructure now supports auto-generated C++ classes for types,
so that yo don't need to repeat keys from your .idl file in your code. See the
permissions API changes in http://crrev.com/119405 for an example of how to do
this.

[dcheng, 2012/08/01 21:15:33]

Done. This is really neat!

+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::OnMessage(
+    const std::string& extension_id,
+    int subchannel,
+    const std::string& payload) {
+  DictionaryValue* dict = new DictionaryValue;
+  dict->SetInteger(kSubchannelKey, subchannel);
+  dict->SetString(kPayloadKey, payload);
+
+  ListValue args;
+  args.Append(dict);
+  std::string json_args;
+  base::JSONWriter::Write(&args, &json_args);
+
+  profile_->GetExtensionEventRouter()->DispatchEventToExtension(
+      extension_id,
+      kEventName,
+      json_args,
+      profile_,
+      GURL());
+}
+
+}  // namespace extensions