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

chrome/browser/media_galleries/media_galleries_dialog_controller.h

Index: chrome/browser/media_galleries/media_galleries_dialog_controller.h
diff --git a/chrome/browser/media_galleries/media_galleries_dialog_controller.h b/chrome/browser/media_galleries/media_galleries_dialog_controller.h
index b50ab468dd96de4712ca8af5b6b1c0888a0132d1..c461e62585e045e75bf7a3c65657e290482413c7 100644
--- a/chrome/browser/media_galleries/media_galleries_dialog_controller.h
+++ b/chrome/browser/media_galleries/media_galleries_dialog_controller.h
@@ -24,8 +24,6 @@ namespace extensions {
 class Extension;
 }
 
-namespace chrome {
-
 class MediaGalleriesDialogController;
 
 // The view.
@@ -190,6 +188,4 @@ class MediaGalleriesDialogController
   DISALLOW_COPY_AND_ASSIGN(MediaGalleriesDialogController);
 };
 
-}  // namespace chrome
-
 #endif  // CHROME_BROWSER_MEDIA_GALLERIES_MEDIA_GALLERIES_DIALOG_CONTROLLER_H_