make media gallery directory tooltips in media gallery config dialog absolute paths

chrome/browser/media_gallery/media_file_system_registry.cc

Index: chrome/browser/media_gallery/media_file_system_registry.cc
diff --git a/chrome/browser/media_gallery/media_file_system_registry.cc b/chrome/browser/media_gallery/media_file_system_registry.cc
index f999209c99d31cec1acdb51c7c573e771cc5dd9f..62121d03d10f8e56cc1a045e191fac2e32eea33d 100644
--- a/chrome/browser/media_gallery/media_file_system_registry.cc
+++ b/chrome/browser/media_gallery/media_file_system_registry.cc
@@ -293,10 +293,9 @@ class ExtensionGalleriesHost
         continue;
       }
 
-      FilePath path = MediaStorageUtil::FindDevicePathById(device_id);
-      if (path.empty())
+      FilePath path = gallery_info.AbsolutePath();
+      if (!path.IsAbsolute())
         continue;
-      path = path.Append(gallery_info.path);
 
       std::string fsid;
       if (MediaStorageUtil::IsMassStorageDevice(device_id)) {