Regularize ownerships and lifecycle for storage monitor platform classes.

chrome/browser/storage_monitor/removable_device_notifications_chromeos.cc

Index: chrome/browser/storage_monitor/removable_device_notifications_chromeos.cc
diff --git a/chrome/browser/storage_monitor/removable_device_notifications_chromeos.cc b/chrome/browser/storage_monitor/removable_device_notifications_chromeos.cc
index 7c679ce0aacbcf2dd7a3ff7b29d5dd296213b8a0..219f25cf76a92c7d6c1ef483f5fed7f123e62eed 100644
--- a/chrome/browser/storage_monitor/removable_device_notifications_chromeos.cc
+++ b/chrome/browser/storage_monitor/removable_device_notifications_chromeos.cc
@@ -6,6 +6,7 @@
 
 #include "chrome/browser/storage_monitor/removable_device_notifications_chromeos.h"
 
+#include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/stl_util.h"
@@ -14,7 +15,9 @@
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/storage_monitor/media_device_notifications_utils.h"
 #include "chrome/browser/storage_monitor/media_storage_util.h"
+#include "chrome/browser/storage_monitor/media_transfer_protocol_device_observer_linux.h"
 #include "chrome/browser/storage_monitor/removable_device_constants.h"
+#include "chrome/common/chrome_switches.h"
 #include "content/public/browser/browser_thread.h"
 
 namespace chromeos {
@@ -90,6 +93,12 @@ RemovableDeviceNotificationsCros::RemovableDeviceNotificationsCros() {
   DCHECK(disks::DiskMountManager::GetInstance());
   disks::DiskMountManager::GetInstance()->AddObserver(this);
   CheckExistingMountPointsOnUIThread();
+
+  if (!CommandLine::ForCurrentProcess()->HasSwitch(switches::kTestType)) {
+    media_transfer_protocol_device_observer_.reset(
+        new chrome::MediaTransferProtocolDeviceObserverLinux());
+    media_transfer_protocol_device_observer_->SetNotifications(receiver());
+  }
 }
 
 RemovableDeviceNotificationsCros::~RemovableDeviceNotificationsCros() {