Do not initialize the volume manager for sign in profiles.

chrome/browser/chromeos/file_manager/volume_manager.cc

 // Copyright 2013 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/file_manager/volume_manager.h"
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/command_line.h"
@@ skipping 225 matching lines @@
   const base::FilePath old_path =
       profile_->GetPrefs()->GetFilePath(prefs::kSelectFileLastDirectory);
   base::FilePath new_path;
   if (!old_path.empty() &&
       file_manager::util::MigratePathFromOldFormat(profile_,
                                                    old_path, &new_path)) {
     profile_->GetPrefs()->SetFilePath(prefs::kSelectFileLastDirectory,
                                       new_path);
   }
 
+  // If in Sign in profile, then skip mounting and listening for mount events.
+  if (chromeos::ProfileHelper::IsSigninProfile(profile_))
+    return;
+
   // Register 'Downloads' folder for the profile to the file system.
-  if (!chromeos::ProfileHelper::IsSigninProfile(profile_)) {
-    const base::FilePath downloads =
-        file_manager::util::GetDownloadsFolderForProfile(profile_);
-    const bool success = RegisterDownloadsMountPoint(profile_, downloads);
-    DCHECK(success);
+  const base::FilePath downloads =
+      file_manager::util::GetDownloadsFolderForProfile(profile_);
+  const bool success = RegisterDownloadsMountPoint(profile_, downloads);
+  DCHECK(success);
 
-    DoMountEvent(chromeos::MOUNT_ERROR_NONE,
-                 CreateDownloadsVolumeInfo(downloads),
-                 kNotRemounting);
-  }
+  DoMountEvent(chromeos::MOUNT_ERROR_NONE,
+               CreateDownloadsVolumeInfo(downloads),
+               kNotRemounting);
 
   // Subscribe to DriveIntegrationService.
   if (drive_integration_service_) {
     drive_integration_service_->AddObserver(this);
     if (drive_integration_service_->IsMounted()) {
       DoMountEvent(chromeos::MOUNT_ERROR_NONE,
                    CreateDriveVolumeInfo(profile_),
                    kNotRemounting);
     }
   }
@@ skipping 379 matching lines @@
     return;
   if (error_code == chromeos::MOUNT_ERROR_NONE)
     mounted_volumes_.erase(volume_info.volume_id);
 
   FOR_EACH_OBSERVER(VolumeManagerObserver,
                     observers_,
                     OnVolumeUnmounted(error_code, volume_info));
 }
 
 }  // namespace file_manager