file_manager: Rename file_manager_event_router.h to event_router.h

chrome/browser/chromeos/extensions/file_manager/file_manager_event_router.cc

Index: chrome/browser/chromeos/extensions/file_manager/file_manager_event_router.cc
diff --git a/chrome/browser/chromeos/extensions/file_manager/file_manager_event_router.cc b/chrome/browser/chromeos/extensions/file_manager/file_manager_event_router.cc
deleted file mode 100644
index 7e122fa0ecba6313b91d9eb49fa786409182981d..0000000000000000000000000000000000000000
--- a/chrome/browser/chromeos/extensions/file_manager/file_manager_event_router.cc
+++ /dev/null
@@ -1,875 +0,0 @@
-// 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/chromeos/extensions/file_manager/file_manager_event_router.h"
-
-#include "base/bind.h"
-#include "base/file_util.h"
-#include "base/message_loop/message_loop.h"
-#include "base/prefs/pref_change_registrar.h"
-#include "base/prefs/pref_service.h"
-#include "base/stl_util.h"
-#include "base/threading/sequenced_worker_pool.h"
-#include "base/values.h"
-#include "chrome/browser/chrome_notification_types.h"
-#include "chrome/browser/chromeos/drive/drive_integration_service.h"
-#include "chrome/browser/chromeos/drive/file_system_interface.h"
-#include "chrome/browser/chromeos/drive/file_system_util.h"
-#include "chrome/browser/chromeos/extensions/file_manager/desktop_notifications.h"
-#include "chrome/browser/chromeos/extensions/file_manager/file_manager_util.h"
-#include "chrome/browser/chromeos/extensions/file_manager/mounted_disk_monitor.h"
-#include "chrome/browser/chromeos/login/login_display_host_impl.h"
-#include "chrome/browser/chromeos/login/screen_locker.h"
-#include "chrome/browser/chromeos/net/connectivity_state_helper.h"
-#include "chrome/browser/drive/drive_service_interface.h"
-#include "chrome/browser/extensions/event_names.h"
-#include "chrome/browser/extensions/event_router.h"
-#include "chrome/browser/extensions/extension_service.h"
-#include "chrome/browser/extensions/extension_system.h"
-#include "chrome/browser/profiles/profile.h"
-#include "chrome/common/pref_names.h"
-#include "chromeos/login/login_state.h"
-#include "content/public/browser/browser_thread.h"
-#include "content/public/browser/notification_source.h"
-#include "webkit/common/fileapi/file_system_types.h"
-#include "webkit/common/fileapi/file_system_util.h"
-
-using chromeos::disks::DiskMountManager;
-using content::BrowserThread;
-using drive::DriveIntegrationService;
-using drive::DriveIntegrationServiceFactory;
-
-namespace file_manager {
-namespace {
-
-const char kPathChanged[] = "changed";
-const char kPathWatchError[] = "error";
-
-// Used as a callback for FileSystem::MarkCacheFileAsUnmounted().
-void OnMarkAsUnmounted(drive::FileError error) {
-  // Do nothing.
-}
-
-const char* MountErrorToString(chromeos::MountError error) {
-  switch (error) {
-    case chromeos::MOUNT_ERROR_NONE:
-      return "success";
-    case chromeos::MOUNT_ERROR_UNKNOWN:
-      return "error_unknown";
-    case chromeos::MOUNT_ERROR_INTERNAL:
-      return "error_internal";
-    case chromeos::MOUNT_ERROR_INVALID_ARGUMENT:
-      return "error_invalid_argument";
-    case chromeos::MOUNT_ERROR_INVALID_PATH:
-      return "error_invalid_path";
-    case chromeos::MOUNT_ERROR_PATH_ALREADY_MOUNTED:
-      return "error_path_already_mounted";
-    case chromeos::MOUNT_ERROR_PATH_NOT_MOUNTED:
-      return "error_path_not_mounted";
-    case chromeos::MOUNT_ERROR_DIRECTORY_CREATION_FAILED:
-      return "error_directory_creation_failed";
-    case chromeos::MOUNT_ERROR_INVALID_MOUNT_OPTIONS:
-      return "error_invalid_mount_options";
-    case chromeos::MOUNT_ERROR_INVALID_UNMOUNT_OPTIONS:
-      return "error_invalid_unmount_options";
-    case chromeos::MOUNT_ERROR_INSUFFICIENT_PERMISSIONS:
-      return "error_insufficient_permissions";
-    case chromeos::MOUNT_ERROR_MOUNT_PROGRAM_NOT_FOUND:
-      return "error_mount_program_not_found";
-    case chromeos::MOUNT_ERROR_MOUNT_PROGRAM_FAILED:
-      return "error_mount_program_failed";
-    case chromeos::MOUNT_ERROR_INVALID_DEVICE_PATH:
-      return "error_invalid_device_path";
-    case chromeos::MOUNT_ERROR_UNKNOWN_FILESYSTEM:
-      return "error_unknown_filesystem";
-    case chromeos::MOUNT_ERROR_UNSUPPORTED_FILESYSTEM:
-      return "error_unsuported_filesystem";
-    case chromeos::MOUNT_ERROR_INVALID_ARCHIVE:
-      return "error_invalid_archive";
-    case chromeos::MOUNT_ERROR_NOT_AUTHENTICATED:
-      return "error_authentication";
-    case chromeos::MOUNT_ERROR_PATH_UNMOUNTED:
-      return "error_path_unmounted";
-  }
-  NOTREACHED();
-  return "";
-}
-
-void DirectoryExistsOnBlockingPool(const base::FilePath& directory_path,
-                                   const base::Closure& success_callback,
-                                   const base::Closure& failure_callback) {
-  DCHECK(BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
-
-  if (base::DirectoryExists(directory_path))
-    BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, success_callback);
-  else
-    BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, failure_callback);
-};
-
-void DirectoryExistsOnUIThread(const base::FilePath& directory_path,
-                               const base::Closure& success_callback,
-                               const base::Closure& failure_callback) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-
-  content::BrowserThread::PostBlockingPoolTask(
-      FROM_HERE,
-      base::Bind(&DirectoryExistsOnBlockingPool,
-                 directory_path,
-                 success_callback,
-                 failure_callback));
-};
-
-// Creates a base::FilePathWatcher and starts watching at |watch_path| with
-// |callback|. Returns NULL on failure.
-base::FilePathWatcher* CreateAndStartFilePathWatcher(
-    const base::FilePath& watch_path,
-    const base::FilePathWatcher::Callback& callback) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
-  DCHECK(!callback.is_null());
-
-  base::FilePathWatcher* watcher(new base::FilePathWatcher);
-  if (!watcher->Watch(watch_path, false /* recursive */, callback)) {
-    delete watcher;
-    return NULL;
-  }
-
-  return watcher;
-}
-
-// Constants for the "transferState" field of onFileTransferUpdated event.
-const char kFileTransferStateStarted[] = "started";
-const char kFileTransferStateInProgress[] = "in_progress";
-const char kFileTransferStateCompleted[] = "completed";
-const char kFileTransferStateFailed[] = "failed";
-
-// Frequency of sending onFileTransferUpdated.
-const int64 kFileTransferEventFrequencyInMilliseconds = 1000;
-
-// Utility function to check if |job_info| is a file uploading job.
-bool IsUploadJob(drive::JobType type) {
-  return type == drive::TYPE_UPLOAD_NEW_FILE ||
-         type == drive::TYPE_UPLOAD_EXISTING_FILE;
-}
-
-// Utility function to check if |job_info| is a file downloading job.
-bool IsDownloadJob(drive::JobType type) {
-  return type == drive::TYPE_DOWNLOAD_FILE;
-}
-
-// Converts the job info to its JSON (Value) form.
-scoped_ptr<base::DictionaryValue> JobInfoToDictionaryValue(
-    const std::string& extension_id,
-    const std::string& job_status,
-    const drive::JobInfo& job_info) {
-  DCHECK(IsActiveFileTransferJobInfo(job_info));
-
-  scoped_ptr<base::DictionaryValue> result(new base::DictionaryValue);
-  GURL url = util::ConvertRelativePathToFileSystemUrl(
-      job_info.file_path, extension_id);
-  result->SetString("fileUrl", url.spec());
-  result->SetString("transferState", job_status);
-  result->SetString("transferType",
-                    IsUploadJob(job_info.job_type) ? "upload" : "download");
-  result->SetInteger("processed",
-                     static_cast<int>(job_info.num_completed_bytes));
-  result->SetInteger("total", static_cast<int>(job_info.num_total_bytes));
-  return result.Pass();
-}
-
-// Checks for availability of the Google+ Photos app.
-bool IsGooglePhotosInstalled(Profile *profile) {
-  ExtensionService* service =
-      extensions::ExtensionSystem::Get(profile)->extension_service();
-  if (!service)
-    return false;
-
-  // Google+ Photos uses several ids for different channels. Therefore, all of
-  // them should be checked.
-  const std::string kGooglePlusPhotosIds[] = {
-    "ebpbnabdhheoknfklmpddcdijjkmklkp",  // G+ Photos staging
-    "efjnaogkjbogokcnohkmnjdojkikgobo",  // G+ Photos prod
-    "ejegoaikibpmikoejfephaneibodccma"   // G+ Photos dev
-  };
-
-  for (size_t i = 0; i < arraysize(kGooglePlusPhotosIds); ++i) {
-    if (service->GetExtensionById(kGooglePlusPhotosIds[i],
-                                  false /* include_disable */) != NULL)
-      return true;
-  }
-
-  return false;
-}
-
-}  // namespace
-
-// Pass dummy value to JobInfo's constructor for make it default constructible.
-FileManagerEventRouter::DriveJobInfoWithStatus::DriveJobInfoWithStatus()
-    : job_info(drive::TYPE_DOWNLOAD_FILE) {
-}
-
-FileManagerEventRouter::DriveJobInfoWithStatus::DriveJobInfoWithStatus(
-    const drive::JobInfo& info, const std::string& status)
-    : job_info(info), status(status) {
-}
-
-FileManagerEventRouter::FileManagerEventRouter(
-    Profile* profile)
-    : notifications_(new DesktopNotifications(profile)),
-      pref_change_registrar_(new PrefChangeRegistrar),
-      profile_(profile),
-      weak_factory_(this) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-
-  file_watcher_callback_ =
-      base::Bind(&FileManagerEventRouter::HandleFileWatchNotification,
-                 weak_factory_.GetWeakPtr());
-}
-
-FileManagerEventRouter::~FileManagerEventRouter() {
-}
-
-void FileManagerEventRouter::Shutdown() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-
-  DLOG_IF(WARNING, !file_watchers_.empty()) << "Not all file watchers are "
-      << "removed. This can happen when Files.app is open during shutdown.";
-  STLDeleteValues(&file_watchers_);
-  if (!profile_) {
-    NOTREACHED();
-    return;
-  }
-
-  DiskMountManager* disk_mount_manager = DiskMountManager::GetInstance();
-  if (disk_mount_manager)
-    disk_mount_manager->RemoveObserver(this);
-
-  DriveIntegrationService* integration_service =
-      DriveIntegrationServiceFactory::FindForProfileRegardlessOfStates(
-          profile_);
-  if (integration_service) {
-    integration_service->RemoveObserver(this);
-    integration_service->file_system()->RemoveObserver(this);
-    integration_service->drive_service()->RemoveObserver(this);
-    integration_service->job_list()->RemoveObserver(this);
-  }
-
-  if (chromeos::ConnectivityStateHelper::IsInitialized()) {
-    chromeos::ConnectivityStateHelper::Get()->
-        RemoveNetworkManagerObserver(this);
-  }
-  profile_ = NULL;
-}
-
-void FileManagerEventRouter::ObserveFileSystemEvents() {
-  if (!profile_) {
-    NOTREACHED();
-    return;
-  }
-  if (!chromeos::LoginState::IsInitialized() ||
-      !chromeos::LoginState::Get()->IsUserLoggedIn()) {
-    return;
-  }
-
-  DiskMountManager* disk_mount_manager = DiskMountManager::GetInstance();
-  if (disk_mount_manager) {
-    disk_mount_manager->RemoveObserver(this);
-    disk_mount_manager->AddObserver(this);
-    disk_mount_manager->RequestMountInfoRefresh();
-  }
-
-  DriveIntegrationService* integration_service =
-      DriveIntegrationServiceFactory::GetForProfileRegardlessOfStates(
-          profile_);
-  if (integration_service) {
-    integration_service->AddObserver(this);
-    integration_service->drive_service()->AddObserver(this);
-    integration_service->file_system()->AddObserver(this);
-    integration_service->job_list()->AddObserver(this);
-  }
-
-  if (chromeos::ConnectivityStateHelper::IsInitialized()) {
-    chromeos::ConnectivityStateHelper::Get()->
-        AddNetworkManagerObserver(this);
-  }
-
-  mounted_disk_monitor_.reset(new MountedDiskMonitor());
-
-  pref_change_registrar_->Init(profile_->GetPrefs());
-
-  pref_change_registrar_->Add(
-      prefs::kExternalStorageDisabled,
-      base::Bind(&FileManagerEventRouter::OnExternalStorageDisabledChanged,
-                 weak_factory_.GetWeakPtr()));
-
-  base::Closure callback =
-      base::Bind(&FileManagerEventRouter::OnFileManagerPrefsChanged,
-                 weak_factory_.GetWeakPtr());
-  pref_change_registrar_->Add(prefs::kDisableDriveOverCellular, callback);
-  pref_change_registrar_->Add(prefs::kDisableDriveHostedFiles, callback);
-  pref_change_registrar_->Add(prefs::kDisableDrive, callback);
-  pref_change_registrar_->Add(prefs::kUse24HourClock, callback);
-}
-
-// File watch setup routines.
-void FileManagerEventRouter::AddFileWatch(
-    const base::FilePath& local_path,
-    const base::FilePath& virtual_path,
-    const std::string& extension_id,
-    const BoolCallback& callback) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  DCHECK(!callback.is_null());
-
-  base::FilePath watch_path = local_path;
-  bool is_remote_watch = false;
-  // Tweak watch path for remote sources - we need to drop leading /special
-  // directory from there in order to be able to pair these events with
-  // their change notifications.
-  if (drive::util::IsUnderDriveMountPoint(watch_path)) {
-    watch_path = drive::util::ExtractDrivePath(watch_path);
-    is_remote_watch = true;
-  }
-
-  WatcherMap::iterator iter = file_watchers_.find(watch_path);
-  if (iter == file_watchers_.end()) {
-    scoped_ptr<FileWatcherExtensions>
-        watch(new FileWatcherExtensions(virtual_path,
-                                        extension_id,
-                                        is_remote_watch));
-    watch->Watch(watch_path,
-                 file_watcher_callback_,
-                 callback);
-    file_watchers_[watch_path] = watch.release();
-  } else {
-    iter->second->AddExtension(extension_id);
-    base::MessageLoopProxy::current()->PostTask(FROM_HERE,
-                                                base::Bind(callback, true));
-  }
-}
-
-void FileManagerEventRouter::RemoveFileWatch(
-    const base::FilePath& local_path,
-    const std::string& extension_id) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-
-  base::FilePath watch_path = local_path;
-  // Tweak watch path for remote sources - we need to drop leading /special
-  // directory from there in order to be able to pair these events with
-  // their change notifications.
-  if (drive::util::IsUnderDriveMountPoint(watch_path)) {
-    watch_path = drive::util::ExtractDrivePath(watch_path);
-  }
-  WatcherMap::iterator iter = file_watchers_.find(watch_path);
-  if (iter == file_watchers_.end())
-    return;
-  // Remove the renderer process for this watch.
-  iter->second->RemoveExtension(extension_id);
-  if (iter->second->ref_count() == 0) {
-    delete iter->second;
-    file_watchers_.erase(iter);
-  }
-}
-
-void FileManagerEventRouter::OnDiskEvent(
-    DiskMountManager::DiskEvent event,
-    const DiskMountManager::Disk* disk) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-
-  // Disregard hidden devices.
-  if (disk->is_hidden())
-    return;
-  if (event == DiskMountManager::DISK_ADDED) {
-    OnDiskAdded(disk);
-  } else if (event == DiskMountManager::DISK_REMOVED) {
-    OnDiskRemoved(disk);
-  }
-}
-
-void FileManagerEventRouter::OnDeviceEvent(
-    DiskMountManager::DeviceEvent event,
-    const std::string& device_path) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-
-  if (event == DiskMountManager::DEVICE_ADDED) {
-    OnDeviceAdded(device_path);
-  } else if (event == DiskMountManager::DEVICE_REMOVED) {
-    OnDeviceRemoved(device_path);
-  } else if (event == DiskMountManager::DEVICE_SCANNED) {
-    OnDeviceScanned(device_path);
-  }
-}
-
-void FileManagerEventRouter::OnMountEvent(
-    DiskMountManager::MountEvent event,
-    chromeos::MountError error_code,
-    const DiskMountManager::MountPointInfo& mount_info) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  // profile_ is NULL if ShutdownOnUIThread() is called earlier. This can
-  // happen at shutdown.
-  if (!profile_)
-    return;
-
-  DCHECK(mount_info.mount_type != chromeos::MOUNT_TYPE_INVALID);
-
-  DispatchMountEvent(event, error_code, mount_info);
-
-  if (mount_info.mount_type == chromeos::MOUNT_TYPE_DEVICE &&
-      event == DiskMountManager::MOUNTING) {
-    DiskMountManager* disk_mount_manager = DiskMountManager::GetInstance();
-    const DiskMountManager::Disk* disk =
-        disk_mount_manager->FindDiskBySourcePath(mount_info.source_path);
-    if (!disk || mounted_disk_monitor_->DiskIsRemounting(*disk))
-      return;
-
-    notifications_->ManageNotificationsOnMountCompleted(
-        disk->system_path_prefix(), disk->drive_label(), disk->is_parent(),
-        error_code == chromeos::MOUNT_ERROR_NONE,
-        error_code == chromeos::MOUNT_ERROR_UNSUPPORTED_FILESYSTEM);
-
-    // If a new device was mounted, a new File manager window may need to be
-    // opened.
-    if (error_code == chromeos::MOUNT_ERROR_NONE)
-      ShowRemovableDeviceInFileManager(
-          *disk,
-          base::FilePath::FromUTF8Unsafe(mount_info.mount_path));
-  } else if (mount_info.mount_type == chromeos::MOUNT_TYPE_ARCHIVE) {
-    // Clear the "mounted" state for archive files in drive cache
-    // when mounting failed or unmounting succeeded.
-    if ((event == DiskMountManager::MOUNTING) !=
-        (error_code == chromeos::MOUNT_ERROR_NONE)) {
-      DriveIntegrationService* integration_service =
-          DriveIntegrationServiceFactory::GetForProfile(profile_);
-      drive::FileSystemInterface* file_system =
-          integration_service ? integration_service->file_system() : NULL;
-      if (file_system) {
-        file_system->MarkCacheFileAsUnmounted(
-            base::FilePath(mount_info.source_path),
-            base::Bind(&OnMarkAsUnmounted));
-      }
-    }
-  }
-}
-
-void FileManagerEventRouter::OnFormatEvent(
-      DiskMountManager::FormatEvent event,
-      chromeos::FormatError error_code,
-      const std::string& device_path) {
-  if (event == DiskMountManager::FORMAT_STARTED) {
-    OnFormatStarted(device_path, error_code == chromeos::FORMAT_ERROR_NONE);
-  } else if (event == DiskMountManager::FORMAT_COMPLETED) {
-    OnFormatCompleted(device_path, error_code == chromeos::FORMAT_ERROR_NONE);
-  }
-}
-
-void FileManagerEventRouter::NetworkManagerChanged() {
-  if (!profile_ ||
-      !extensions::ExtensionSystem::Get(profile_)->event_router()) {
-    NOTREACHED();
-    return;
-  }
-  scoped_ptr<extensions::Event> event(new extensions::Event(
-      extensions::event_names::kOnFileBrowserDriveConnectionStatusChanged,
-      scoped_ptr<ListValue>(new ListValue())));
-  extensions::ExtensionSystem::Get(profile_)->event_router()->
-      BroadcastEvent(event.Pass());
-}
-
-void FileManagerEventRouter::DefaultNetworkChanged() {
-  NetworkManagerChanged();
-}
-
-void FileManagerEventRouter::OnExternalStorageDisabledChanged() {
-  // If the policy just got disabled we have to unmount every device currently
-  // mounted. The opposite is fine - we can let the user re-plug her device to
-  // make it available.
-  if (profile_->GetPrefs()->GetBoolean(prefs::kExternalStorageDisabled)) {
-    DiskMountManager* manager = DiskMountManager::GetInstance();
-    DiskMountManager::MountPointMap mounts(manager->mount_points());
-    for (DiskMountManager::MountPointMap::const_iterator it = mounts.begin();
-         it != mounts.end(); ++it) {
-      LOG(INFO) << "Unmounting " << it->second.mount_path
-                << " because of policy.";
-      manager->UnmountPath(it->second.mount_path,
-                           chromeos::UNMOUNT_OPTIONS_NONE,
-                           DiskMountManager::UnmountPathCallback());
-    }
-  }
-}
-
-void FileManagerEventRouter::OnFileManagerPrefsChanged() {
-  if (!profile_ ||
-      !extensions::ExtensionSystem::Get(profile_)->event_router()) {
-    NOTREACHED();
-    return;
-  }
-
-  scoped_ptr<extensions::Event> event(new extensions::Event(
-      extensions::event_names::kOnFileBrowserPreferencesChanged,
-      scoped_ptr<ListValue>(new ListValue())));
-  extensions::ExtensionSystem::Get(profile_)->event_router()->
-      BroadcastEvent(event.Pass());
-}
-
-void FileManagerEventRouter::OnJobAdded(const drive::JobInfo& job_info) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  OnJobUpdated(job_info);
-}
-
-void FileManagerEventRouter::OnJobUpdated(const drive::JobInfo& job_info) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  if (!drive::IsActiveFileTransferJobInfo(job_info))
-    return;
-
-  bool is_new_job = (drive_jobs_.find(job_info.job_id) == drive_jobs_.end());
-
-  // Replace with the latest job info.
-  drive_jobs_[job_info.job_id] = DriveJobInfoWithStatus(
-      job_info,
-      is_new_job ? kFileTransferStateStarted : kFileTransferStateInProgress);
-
-  // Fire event if needed.
-  bool always = is_new_job;
-  SendDriveFileTransferEvent(always);
-}
-
-void FileManagerEventRouter::OnJobDone(const drive::JobInfo& job_info,
-                                       drive::FileError error) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  if (!drive::IsActiveFileTransferJobInfo(job_info))
-    return;
-
-  // Replace with the latest job info.
-  drive_jobs_[job_info.job_id] = DriveJobInfoWithStatus(
-      job_info,
-      error == drive::FILE_ERROR_OK ? kFileTransferStateCompleted
-                                    : kFileTransferStateFailed);
-
-  // Fire event if needed.
-  bool always = true;
-  SendDriveFileTransferEvent(always);
-
-  // Forget about the job.
-  drive_jobs_.erase(job_info.job_id);
-}
-
-void FileManagerEventRouter::SendDriveFileTransferEvent(bool always) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-
-  const base::Time now = base::Time::Now();
-
-  // When |always| flag is not set, we don't send the event until certain
-  // amount of time passes after the previous one. This is to avoid
-  // flooding the IPC between extensions by many onFileTransferUpdated events.
-  if (!always) {
-    const int64 delta = (now - last_file_transfer_event_).InMilliseconds();
-    // delta < 0 may rarely happen if system clock is synced and rewinded.
-    // To be conservative, we don't skip in that case.
-    if (0 <= delta && delta < kFileTransferEventFrequencyInMilliseconds)
-      return;
-  }
-
-  // Convert the current |drive_jobs_| to a JSON value.
-  scoped_ptr<base::ListValue> event_list(new base::ListValue);
-  for (std::map<drive::JobID, DriveJobInfoWithStatus>::iterator
-       iter = drive_jobs_.begin(); iter != drive_jobs_.end(); ++iter) {
-
-    scoped_ptr<base::DictionaryValue> job_info_dict(
-        JobInfoToDictionaryValue(kFileBrowserDomain,
-                                 iter->second.status,
-                                 iter->second.job_info));
-    event_list->Append(job_info_dict.release());
-  }
-
-  scoped_ptr<ListValue> args(new ListValue());
-  args->Append(event_list.release());
-  scoped_ptr<extensions::Event> event(new extensions::Event(
-      extensions::event_names::kOnFileTransfersUpdated, args.Pass()));
-  extensions::ExtensionSystem::Get(profile_)->event_router()->
-      DispatchEventToExtension(kFileBrowserDomain, event.Pass());
-
-  last_file_transfer_event_ = now;
-}
-
-void FileManagerEventRouter::OnDirectoryChanged(
-    const base::FilePath& directory_path) {
-  HandleFileWatchNotification(directory_path, false);
-}
-
-void FileManagerEventRouter::OnFileSystemMounted() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-
-  const std::string& drive_path = drive::util::GetDriveMountPointPathAsString();
-  DiskMountManager::MountPointInfo mount_info(
-      drive_path,
-      drive_path,
-      chromeos::MOUNT_TYPE_GOOGLE_DRIVE,
-      chromeos::disks::MOUNT_CONDITION_NONE);
-
-  // Raise mount event.
-  // We can pass chromeos::MOUNT_ERROR_NONE even when authentication is failed
-  // or network is unreachable. These two errors will be handled later.
-  OnMountEvent(DiskMountManager::MOUNTING, chromeos::MOUNT_ERROR_NONE,
-               mount_info);
-}
-
-void FileManagerEventRouter::OnFileSystemBeingUnmounted() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-
-  // Raise a mount event to notify the File Manager.
-  const std::string& drive_path = drive::util::GetDriveMountPointPathAsString();
-  DiskMountManager::MountPointInfo mount_info(
-      drive_path,
-      drive_path,
-      chromeos::MOUNT_TYPE_GOOGLE_DRIVE,
-      chromeos::disks::MOUNT_CONDITION_NONE);
-  OnMountEvent(DiskMountManager::UNMOUNTING, chromeos::MOUNT_ERROR_NONE,
-               mount_info);
-}
-
-void FileManagerEventRouter::OnRefreshTokenInvalid() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-
-  // Raise a DriveConnectionStatusChanged event to notify the status offline.
-  scoped_ptr<extensions::Event> event(new extensions::Event(
-      extensions::event_names::kOnFileBrowserDriveConnectionStatusChanged,
-      scoped_ptr<ListValue>(new ListValue())));
-  extensions::ExtensionSystem::Get(profile_)->event_router()->
-      BroadcastEvent(event.Pass());
-}
-
-void FileManagerEventRouter::HandleFileWatchNotification(
-    const base::FilePath& local_path, bool got_error) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-
-  WatcherMap::const_iterator iter = file_watchers_.find(local_path);
-  if (iter == file_watchers_.end()) {
-    return;
-  }
-  DispatchDirectoryChangeEvent(iter->second->virtual_path(), got_error,
-                               iter->second->extensions());
-}
-
-void FileManagerEventRouter::DispatchDirectoryChangeEvent(
-    const base::FilePath& virtual_path,
-    bool got_error,
-    const FileWatcherExtensions::ExtensionUsageRegistry& extensions) {
-  if (!profile_) {
-    NOTREACHED();
-    return;
-  }
-
-  for (FileWatcherExtensions::ExtensionUsageRegistry::const_iterator iter =
-           extensions.begin(); iter != extensions.end(); ++iter) {
-    GURL target_origin_url(extensions::Extension::GetBaseURLFromExtensionId(
-        iter->first));
-    GURL base_url = fileapi::GetFileSystemRootURI(target_origin_url,
-        fileapi::kFileSystemTypeExternal);
-    GURL target_directory_url = GURL(base_url.spec() + virtual_path.value());
-    scoped_ptr<ListValue> args(new ListValue());
-    DictionaryValue* watch_info = new DictionaryValue();
-    args->Append(watch_info);
-    watch_info->SetString("directoryUrl", target_directory_url.spec());
-    watch_info->SetString("eventType",
-                          got_error ? kPathWatchError : kPathChanged);
-
-    // TODO(mtomasz): Pass set of entries. http://crbug.com/157834
-    ListValue* watch_info_entries = new ListValue();
-    watch_info->Set("changedEntries", watch_info_entries);
-
-    scoped_ptr<extensions::Event> event(new extensions::Event(
-        extensions::event_names::kOnDirectoryChanged, args.Pass()));
-    extensions::ExtensionSystem::Get(profile_)->event_router()->
-        DispatchEventToExtension(iter->first, event.Pass());
-  }
-}
-
-void FileManagerEventRouter::DispatchMountEvent(
-    DiskMountManager::MountEvent event,
-    chromeos::MountError error_code,
-    const DiskMountManager::MountPointInfo& mount_info) {
-  scoped_ptr<ListValue> args(new ListValue());
-  DictionaryValue* mount_info_value = new DictionaryValue();
-  args->Append(mount_info_value);
-  mount_info_value->SetString("eventType",
-      event == DiskMountManager::MOUNTING ? "mount" : "unmount");
-  mount_info_value->SetString("status", MountErrorToString(error_code));
-  mount_info_value->SetString(
-      "mountType",
-      DiskMountManager::MountTypeToString(mount_info.mount_type));
-
-  // Add sourcePath to the event.
-  mount_info_value->SetString("sourcePath", mount_info.source_path);
-
-  base::FilePath relative_mount_path;
-
-  // If there were no error or some special conditions occurred, add mountPath
-  // to the event.
-  if (event == DiskMountManager::UNMOUNTING ||
-      error_code == chromeos::MOUNT_ERROR_NONE ||
-      mount_info.mount_condition) {
-    // Convert mount point path to relative path with the external file system
-    // exposed within File API.
-    if (util::ConvertFileToRelativeFileSystemPath(
-            profile_,
-            kFileBrowserDomain,
-            base::FilePath(mount_info.mount_path),
-            &relative_mount_path)) {
-      mount_info_value->SetString("mountPath",
-                                  "/" + relative_mount_path.value());
-    } else {
-      mount_info_value->SetString("status",
-          MountErrorToString(chromeos::MOUNT_ERROR_PATH_UNMOUNTED));
-    }
-  }
-
-  scoped_ptr<extensions::Event> extension_event(new extensions::Event(
-      extensions::event_names::kOnFileBrowserMountCompleted, args.Pass()));
-  extensions::ExtensionSystem::Get(profile_)->event_router()->
-      BroadcastEvent(extension_event.Pass());
-}
-
-void FileManagerEventRouter::ShowRemovableDeviceInFileManager(
-    const DiskMountManager::Disk& disk, const base::FilePath& mount_path) {
-  // Do not attempt to open File Manager while the login is in progress or
-  // the screen is locked.
-  if (chromeos::LoginDisplayHostImpl::default_host() ||
-      chromeos::ScreenLocker::default_screen_locker())
-    return;
-
-  // According to DCF (Design rule of Camera File system) by JEITA / CP-3461
-  // cameras should have pictures located in the DCIM root directory.
-  const base::FilePath dcim_path = mount_path.Append(
-      FILE_PATH_LITERAL("DCIM"));
-
-  // If there is no DCIM folder or an external photo importer is not available,
-  // then launch Files.app.
-  DirectoryExistsOnUIThread(
-      dcim_path,
-      IsGooglePhotosInstalled(profile_) ?
-        base::Bind(&base::DoNothing) :
-        base::Bind(&util::ViewRemovableDrive, mount_path),
-      base::Bind(&util::ViewRemovableDrive, mount_path));
-}
-
-void FileManagerEventRouter::OnDiskAdded(
-    const DiskMountManager::Disk* disk) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-
-  VLOG(1) << "Disk added: " << disk->device_path();
-  if (disk->device_path().empty()) {
-    VLOG(1) << "Empty system path for " << disk->device_path();
-    return;
-  }
-
-  // If disk is not mounted yet and it has media and there is no policy
-  // forbidding external storage, give it a try.
-  if (disk->mount_path().empty() && disk->has_media() &&
-      !profile_->GetPrefs()->GetBoolean(prefs::kExternalStorageDisabled)) {
-    // Initiate disk mount operation. MountPath auto-detects the filesystem
-    // format if the second argument is empty. The third argument (mount label)
-    // is not used in a disk mount operation.
-    DiskMountManager::GetInstance()->MountPath(
-        disk->device_path(), std::string(), std::string(),
-        chromeos::MOUNT_TYPE_DEVICE);
-  } else {
-    // Either the disk was mounted or it has no media. In both cases we don't
-    // want the Scanning notification to persist.
-    notifications_->HideNotification(DesktopNotifications::DEVICE,
-                                     disk->system_path_prefix());
-  }
-}
-
-void FileManagerEventRouter::OnDiskRemoved(
-    const DiskMountManager::Disk* disk) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-
-  VLOG(1) << "Disk removed: " << disk->device_path();
-
-  if (!disk->mount_path().empty()) {
-    DiskMountManager::GetInstance()->UnmountPath(
-        disk->mount_path(),
-        chromeos::UNMOUNT_OPTIONS_LAZY,
-        DiskMountManager::UnmountPathCallback());
-  }
-}
-
-void FileManagerEventRouter::OnDeviceAdded(
-    const std::string& device_path) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-
-  VLOG(1) << "Device added : " << device_path;
-
-  // If the policy is set instead of showing the new device notification we show
-  // a notification that the operation is not permitted.
-  if (profile_->GetPrefs()->GetBoolean(prefs::kExternalStorageDisabled)) {
-    notifications_->ShowNotification(
-        DesktopNotifications::DEVICE_EXTERNAL_STORAGE_DISABLED,
-        device_path);
-    return;
-  }
-
-  notifications_->RegisterDevice(device_path);
-  notifications_->ShowNotificationDelayed(DesktopNotifications::DEVICE,
-                                          device_path,
-                                          base::TimeDelta::FromSeconds(5));
-}
-
-void FileManagerEventRouter::OnDeviceRemoved(
-    const std::string& device_path) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-
-  VLOG(1) << "Device removed : " << device_path;
-  notifications_->HideNotification(DesktopNotifications::DEVICE,
-                                   device_path);
-  notifications_->HideNotification(DesktopNotifications::DEVICE_FAIL,
-                                   device_path);
-  notifications_->UnregisterDevice(device_path);
-}
-
-void FileManagerEventRouter::OnDeviceScanned(
-    const std::string& device_path) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  VLOG(1) << "Device scanned : " << device_path;
-}
-
-void FileManagerEventRouter::OnFormatStarted(
-    const std::string& device_path, bool success) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-
-  if (success) {
-    notifications_->ShowNotification(DesktopNotifications::FORMAT_START,
-                                     device_path);
-  } else {
-    notifications_->ShowNotification(
-        DesktopNotifications::FORMAT_START_FAIL, device_path);
-  }
-}
-
-void FileManagerEventRouter::OnFormatCompleted(
-    const std::string& device_path, bool success) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-
-  if (success) {
-    notifications_->HideNotification(DesktopNotifications::FORMAT_START,
-                                     device_path);
-    notifications_->ShowNotification(DesktopNotifications::FORMAT_SUCCESS,
-                                     device_path);
-    // Hide it after a couple of seconds.
-    notifications_->HideNotificationDelayed(
-        DesktopNotifications::FORMAT_SUCCESS,
-        device_path,
-        base::TimeDelta::FromSeconds(4));
-    // MountPath auto-detects filesystem format if second argument is empty.
-    // The third argument (mount label) is not used in a disk mount operation.
-    DiskMountManager::GetInstance()->MountPath(device_path, std::string(),
-                                               std::string(),
-                                               chromeos::MOUNT_TYPE_DEVICE);
-  } else {
-    notifications_->HideNotification(DesktopNotifications::FORMAT_START,
-                                     device_path);
-    notifications_->ShowNotification(DesktopNotifications::FORMAT_FAIL,
-                                     device_path);
-  }
-}
-
-}  // namespace file_manager