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

chrome/browser/media_galleries/scoped_mtp_device_map_entry.h

Index: chrome/browser/media_galleries/scoped_mtp_device_map_entry.h
diff --git a/chrome/browser/media_galleries/scoped_mtp_device_map_entry.h b/chrome/browser/media_galleries/scoped_mtp_device_map_entry.h
index ffb6f55f68086584881cfe9e393424053db4ff55..565b6b31facd37dc9994ae29e421d55dda5665d4 100644
--- a/chrome/browser/media_galleries/scoped_mtp_device_map_entry.h
+++ b/chrome/browser/media_galleries/scoped_mtp_device_map_entry.h
@@ -11,8 +11,6 @@
 #include "base/sequenced_task_runner_helpers.h"
 #include "content/public/browser/browser_thread.h"
 
-namespace chrome {
-
 class MTPDeviceAsyncDelegate;
 
 // ScopedMTPDeviceMapEntry manages the reference count on a particular
@@ -55,6 +53,4 @@ class ScopedMTPDeviceMapEntry
   DISALLOW_COPY_AND_ASSIGN(ScopedMTPDeviceMapEntry);
 };
 
-}  // namespace chrome
-
 #endif  // CHROME_BROWSER_MEDIA_GALLERIES_SCOPED_MTP_DEVICE_MAP_ENTRY_H_