Update Windows System Monitor Removable Device Impl.

chrome/browser/system_monitor/media_storage_util.cc

Index: chrome/browser/system_monitor/media_storage_util.cc
diff --git a/chrome/browser/system_monitor/media_storage_util.cc b/chrome/browser/system_monitor/media_storage_util.cc
index c6a03ed6c1b057450d8aa2ff3bc0b9c237412a72..534a3867231230b0d07f0373797fc984165ea6ac 100644
--- a/chrome/browser/system_monitor/media_storage_util.cc
+++ b/chrome/browser/system_monitor/media_storage_util.cc
@@ -221,7 +221,7 @@ bool MediaStorageUtil::GetDeviceInfoFromPath(const FilePath& path,
 
   bool found_device = false;
   base::SystemMonitor::RemovableStorageInfo device_info;
-#if (defined(OS_LINUX) || defined(OS_MACOSX)) && !defined(OS_CHROMEOS)
+#if !defined(OS_CHROMEOS)
   RemovableDeviceNotifications* notifier =
       RemovableDeviceNotifications::GetInstance();
   found_device = notifier->GetDeviceInfoForPath(path, &device_info);
@@ -248,6 +248,12 @@ bool MediaStorageUtil::GetDeviceInfoFromPath(const FilePath& path,
     return true;
   }
 
+  // On Posix systems, there's one root so any absolute path could be valid.
+#if !defined(OS_POSIX)
+  if (!found_device)
+    return false;
+#endif
+
   if (device_id)
     *device_id = MakeDeviceId(FIXED_MASS_STORAGE, path.AsUTF8Unsafe());
   if (device_name)