Convert the async device ID getter to a chrome resource host

chrome/browser/renderer_host/pepper/chrome_browser_pepper_host_factory.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/renderer_host/pepper/chrome_browser_pepper_host_factory.h"
+
+#include "chrome/browser/renderer_host/pepper/pepper_flash_device_id_host.h"
+#include "content/public/browser/browser_ppapi_host.h"
+#include "ppapi/host/ppapi_host.h"
+#include "ppapi/host/resource_host.h"
+#include "ppapi/proxy/ppapi_messages.h"
+#include "ppapi/shared_impl/ppapi_permissions.h"
+
+using ppapi::host::ResourceHost;
+
+namespace chrome {
+
+ChromeBrowserPepperHostFactory::ChromeBrowserPepperHostFactory(
+    content::BrowserPpapiHost* host)
+    : host_(host) {
+}
+
+ChromeBrowserPepperHostFactory::~ChromeBrowserPepperHostFactory() {
+}
+
+scoped_ptr<ResourceHost> ChromeBrowserPepperHostFactory::CreateResourceHost(
+    ppapi::host::PpapiHost* host,
+    const ppapi::proxy::ResourceMessageCallParams& params,
+    PP_Instance instance,
+    const IPC::Message& message) {
+  DCHECK(host == host_->GetPpapiHost());
+
+  // Make sure the plugin is giving us a valid instance for this resource.
+  if (!host_->IsValidInstance(instance))
+    return scoped_ptr<ResourceHost>();
+
+  // Private interfaces.
+  if (host_->GetPpapiHost()->permissions().HasPermission(
+          ppapi::PERMISSION_PRIVATE)) {
+    switch (message.type()) {
+      case PpapiHostMsg_FlashDeviceID_Create::ID:
+        return scoped_ptr<ResourceHost>(new PepperFlashDeviceIDHost(
+            host_, instance, params.pp_resource()));
+    }
+  }
+  return scoped_ptr<ResourceHost>();
+}
+
+}  // namespace chrome