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

chrome/browser/media_galleries/win/portable_device_map_service.h

Index: chrome/browser/media_galleries/win/portable_device_map_service.h
diff --git a/chrome/browser/media_galleries/win/portable_device_map_service.h b/chrome/browser/media_galleries/win/portable_device_map_service.h
index 41671c6fe24a01367a26eb0c41c3bda1ce88e988..01a59006799c66522c9b1207f8c634dd7ba27187 100644
--- a/chrome/browser/media_galleries/win/portable_device_map_service.h
+++ b/chrome/browser/media_galleries/win/portable_device_map_service.h
@@ -13,8 +13,6 @@
 #include "base/synchronization/lock.h"
 #include "base/win/scoped_comptr.h"
 
-namespace chrome {
-
 // PortableDeviceMapService keeps track of initialized portable device
 // interfaces. PortableDeviceMapService owns the portable device interfaces.
 class PortableDeviceMapService {
@@ -75,6 +73,4 @@ class PortableDeviceMapService {
   DISALLOW_COPY_AND_ASSIGN(PortableDeviceMapService);
 };
 
-}  // namespace chrome
-
 #endif  // CHROME_BROWSER_MEDIA_GALLERIES_WIN_PORTABLE_DEVICE_MAP_SERVICE_H_