Add flag for MTP write support.

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/command_line.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/memory/weak_ptr.h"
 #include "base/metrics/histogram.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.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/file_manager/path_util.h"
 #include "chrome/browser/chromeos/file_manager/snapshot_manager.h"
 #include "chrome/browser/chromeos/file_manager/volume_manager_factory.h"
 #include "chrome/browser/chromeos/file_manager/volume_manager_observer.h"
 #include "chrome/browser/chromeos/file_system_provider/provided_file_system_info.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
 #include "chrome/browser/media_galleries/fileapi/mtp_device_map_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/pref_names.h"
+#include "chromeos/chromeos_switches.h"
 #include "chromeos/disks/disk_mount_manager.h"
 #include "components/storage_monitor/storage_monitor.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 #include "storage/browser/fileapi/external_mount_points.h"
 
 namespace file_manager {
 namespace {
 
 const char kFileManagerMTPMountNamePrefix[] = "fileman-mtp-";
@@ skipping 641 matching lines @@
     label = base_name + base::StringPrintf(" (%d)", i);
 
   bool result =
       storage::ExternalMountPoints::GetSystemInstance()->RegisterFileSystem(
           fsid,
           storage::kFileSystemTypeDeviceMediaAsFileStorage,
           storage::FileSystemMountOption(),
           path);
   DCHECK(result);
 
-  // TODO(yawano) A variable to switch MTP write support. This variable should
-  // be false until MTP write operation is implemented and shipped.
-  bool write_supported = false;
+  bool write_supported = base::CommandLine::ForCurrentProcess()->HasSwitch(
+      chromeos::switches::kEnableMtpWriteSupport);
 
   content::BrowserThread::PostTask(
       content::BrowserThread::IO, FROM_HERE,
       base::Bind(&MTPDeviceMapService::RegisterMTPFileSystem,
                  base::Unretained(MTPDeviceMapService::GetInstance()),
                  info.location(), fsid, !write_supported /* read_only */));
 
   linked_ptr<Volume> volume(
       Volume::CreateForMTP(path, label, !write_supported));
   DoMountEvent(chromeos::MOUNT_ERROR_NONE, volume);
@@ skipping 124 matching lines @@
   if (mounted_volumes_.find(volume->volume_id()) == mounted_volumes_.end())
     return;
   if (error_code == chromeos::MOUNT_ERROR_NONE)
     mounted_volumes_.erase(volume->volume_id());
 
   FOR_EACH_OBSERVER(VolumeManagerObserver, observers_,
                     OnVolumeUnmounted(error_code, *volume.get()));
 }
 
 }  // namespace file_manager