Cleanup: Remove chrome namespace for storage monitor and media galleries.

chrome/browser/ui/gtk/extensions/media_galleries_dialog_gtk.cc

Index: chrome/browser/ui/gtk/extensions/media_galleries_dialog_gtk.cc
diff --git a/chrome/browser/ui/gtk/extensions/media_galleries_dialog_gtk.cc b/chrome/browser/ui/gtk/extensions/media_galleries_dialog_gtk.cc
index aaf313055a4e8206f3f3472250b11f86cf128e97..065807dcba0f978fdff93fa175cde1a7b1ce1a6a 100644
--- a/chrome/browser/ui/gtk/extensions/media_galleries_dialog_gtk.cc
+++ b/chrome/browser/ui/gtk/extensions/media_galleries_dialog_gtk.cc
@@ -15,8 +15,6 @@
 
 using web_modal::WebContentsModalDialogManager;
 
-namespace chrome {
-
 namespace {
 
 // Color used for additional attachment detail text for galleries.
@@ -246,5 +244,3 @@ MediaGalleriesDialog* MediaGalleriesDialog::Create(
     MediaGalleriesDialogController* controller) {
   return new MediaGalleriesDialogGtk(controller);
 }
-
-}  // namespace chrome