Reland: chromeos: Convert ash VPNDelegate interface to mojo

chrome/browser/ui/ash/vpn_list_forwarder.cc

 // Copyright 2015 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/ui/ash/vpn_delegate_chromeos.h"
+#include "chrome/browser/ui/ash/vpn_list_forwarder.h"
 
+#include "ash/public/interfaces/vpn_list.mojom.h"
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
 #include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/ui/ash/system_tray_client.h"
+#include "chrome/browser/ui/ash/ash_util.h"
 #include "components/user_manager/user.h"
 #include "components/user_manager/user_manager.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_source.h"
-#include "extensions/browser/api/vpn_provider/vpn_service.h"
-#include "extensions/browser/api/vpn_provider/vpn_service_factory.h"
+#include "content/public/common/service_manager_connection.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/extension_set.h"
 #include "extensions/common/permissions/api_permission.h"
 #include "extensions/common/permissions/permissions_data.h"
-#include "third_party/cros_system_api/dbus/shill/dbus-constants.h"
-#include "ui/base/l10n/l10n_util.h"
+#include "services/service_manager/public/cpp/connector.h"
 
 namespace {
 
 bool IsVPNProvider(const extensions::Extension* extension) {
   return extension->permissions_data()->HasAPIPermission(
       extensions::APIPermission::kVpnProvider);
 }
 
 Profile* GetProfileForPrimaryUser() {
   const user_manager::User* const primary_user =
       user_manager::UserManager::Get()->GetPrimaryUser();
   if (!primary_user)
     return nullptr;
 
   return chromeos::ProfileHelper::Get()->GetProfileByUser(primary_user);
 }
 
+// Connects to the VpnList mojo interface in ash.
+ash::mojom::VpnListPtr ConnectToVpnList() {
+  ash::mojom::VpnListPtr vpn_list;
+  service_manager::Connector* connector =
+      content::ServiceManagerConnection::GetForProcess()->GetConnector();
+  // Under mash the VpnList interface is in the ash process. In classic ash
+  // we provide it to ourself.
+  if (chrome::IsRunningInMash())
+    connector->ConnectToInterface("ash", &vpn_list);
+  else
+    connector->ConnectToInterface("content_browser", &vpn_list);
+  return vpn_list;
+}
+
 }  // namespace
 
-VPNDelegateChromeOS::VPNDelegateChromeOS() : weak_factory_(this) {
+VpnListForwarder::VpnListForwarder() : weak_factory_(this) {
   if (user_manager::UserManager::Get()->GetPrimaryUser()) {
     // If a user is logged in, start observing the primary user's extension
     // registry immediately.
     AttachToPrimaryUserExtensionRegistry();
   } else {
     // If no user is logged in, wait until the first user logs in (thus becoming
     // the primary user) and a profile is created for that user.
     registrar_.Add(this, chrome::NOTIFICATION_PROFILE_CREATED,
                    content::NotificationService::AllSources());
   }
 }
 
-VPNDelegateChromeOS::~VPNDelegateChromeOS() {
+VpnListForwarder::~VpnListForwarder() {
   if (extension_registry_)
     extension_registry_->RemoveObserver(this);
 }
 
-void VPNDelegateChromeOS::ShowAddPage(const std::string& extension_id) {
-  if (extension_id.empty()) {
-    // Show the "add network" dialog for the built-in OpenVPN/L2TP provider.
-    SystemTrayClient::Get()->ShowNetworkCreate(shill::kTypeVPN);
-    return;
-  }
-
-  Profile* const profile = GetProfileForPrimaryUser();
-  if (!profile)
-    return;
-
-  // Request that the third-party VPN provider identified by |key.extension_id|
-  // show its "add network" dialog.
-  chromeos::VpnServiceFactory::GetForBrowserContext(profile)
-      ->SendShowAddDialogToExtension(extension_id);
-}
-
-void VPNDelegateChromeOS::OnExtensionLoaded(
+void VpnListForwarder::OnExtensionLoaded(
     content::BrowserContext* browser_context,
     const extensions::Extension* extension) {
   if (IsVPNProvider(extension))
     UpdateVPNProviders();
 }
 
-void VPNDelegateChromeOS::OnExtensionUnloaded(
+void VpnListForwarder::OnExtensionUnloaded(
     content::BrowserContext* browser_context,
     const extensions::Extension* extension,
     extensions::UnloadedExtensionInfo::Reason reason) {
   if (IsVPNProvider(extension))
     UpdateVPNProviders();
 }
 
-void VPNDelegateChromeOS::OnShutdown(extensions::ExtensionRegistry* registry) {
+void VpnListForwarder::OnShutdown(extensions::ExtensionRegistry* registry) {
   DCHECK(extension_registry_);
   extension_registry_->RemoveObserver(this);
   extension_registry_ = nullptr;
 }
 
-void VPNDelegateChromeOS::Observe(int type,
-                                  const content::NotificationSource& source,
-                                  const content::NotificationDetails& details) {
+void VpnListForwarder::Observe(int type,
+                               const content::NotificationSource& source,
+                               const content::NotificationDetails& details) {
   DCHECK_EQ(chrome::NOTIFICATION_PROFILE_CREATED, type);
   const Profile* const profile = content::Source<Profile>(source).ptr();
   if (!chromeos::ProfileHelper::Get()->IsPrimaryProfile(profile)) {
     // If the profile that was just created does not belong to the primary user
     // (e.g. login profile), ignore it.
     return;
   }
 
   // The first user logged in (thus becoming the primary user) and a profile was
   // created for that user. Stop observing profile creation. Wait one message
   // loop cycle to allow other code which observes the
   // chrome::NOTIFICATION_PROFILE_CREATED notification to finish initializing
   // the profile, then start observing the primary user's extension registry.
   registrar_.RemoveAll();
   base::ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE,
-      base::Bind(&VPNDelegateChromeOS::AttachToPrimaryUserExtensionRegistry,
+      base::Bind(&VpnListForwarder::AttachToPrimaryUserExtensionRegistry,
                  weak_factory_.GetWeakPtr()));
 }
 
-void VPNDelegateChromeOS::UpdateVPNProviders() {
+void VpnListForwarder::UpdateVPNProviders() {
   DCHECK(extension_registry_);
 
-  std::vector<ash::VPNProvider> third_party_providers;
+  std::vector<ash::mojom::ThirdPartyVpnProviderPtr> third_party_providers;
   for (const auto& extension : extension_registry_->enabled_extensions()) {
-    if (IsVPNProvider(extension.get())) {
-      third_party_providers.push_back(
-          ash::VPNProvider(extension->id(), extension->name()));
-    }
+    if (!IsVPNProvider(extension.get()))
+      continue;
+
+    ash::mojom::ThirdPartyVpnProviderPtr provider =
+        ash::mojom::ThirdPartyVpnProvider::New();
+    provider->name = extension->name();
+    provider->extension_id = extension->id();
+    third_party_providers.push_back(std::move(provider));
   }
 
-  // Ash adds the built-in OpenVPN/L2TP provider.
-  SetThirdPartyVpnProviders(third_party_providers);
+  // Ash starts without any third-party providers. If we've never sent one then
+  // there's no need to send an empty list. This case commonly occurs on startup
+  // when the user has no third-party VPN extensions installed.
+  if (!sent_providers_ && third_party_providers.empty())
+    return;
+
+  // It's rare to install or uninstall VPN provider extensions, so don't bother
+  // caching the interface pointer between calls to this function.
+  ash::mojom::VpnListPtr vpn_list = ConnectToVpnList();
+  vpn_list->SetThirdPartyVpnProviders(std::move(third_party_providers));
+
+  sent_providers_ = true;
 }
 
-void VPNDelegateChromeOS::AttachToPrimaryUserExtensionRegistry() {
+void VpnListForwarder::AttachToPrimaryUserExtensionRegistry() {
   DCHECK(!extension_registry_);
   extension_registry_ =
       extensions::ExtensionRegistry::Get(GetProfileForPrimaryUser());
   extension_registry_->AddObserver(this);
 
   UpdateVPNProviders();
 }