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

chrome/browser/media_galleries/fileapi/mtp_device_map_service.h

Index: chrome/browser/media_galleries/fileapi/mtp_device_map_service.h
diff --git a/chrome/browser/media_galleries/fileapi/mtp_device_map_service.h b/chrome/browser/media_galleries/fileapi/mtp_device_map_service.h
index 129a3c1edbec098eb3406791f4b35959974b35ec..5174c380395b3baa4de19bb6e7f8f0ecc4d2eaa1 100644
--- a/chrome/browser/media_galleries/fileapi/mtp_device_map_service.h
+++ b/chrome/browser/media_galleries/fileapi/mtp_device_map_service.h
@@ -11,8 +11,6 @@
 #include "base/lazy_instance.h"
 #include "base/threading/thread_checker.h"
 
-namespace chrome {
-
 class MTPDeviceAsyncDelegate;
 
 // This class provides media transfer protocol (MTP) device delegate to
@@ -62,6 +60,4 @@ class MTPDeviceMapService {
   DISALLOW_COPY_AND_ASSIGN(MTPDeviceMapService);
 };
 
-}  // namespace chrome
-
 #endif  // CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_MTP_DEVICE_MAP_SERVICE_H_