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

chrome/browser/media_galleries/media_galleries_test_util.cc

Index: chrome/browser/media_galleries/media_galleries_test_util.cc
diff --git a/chrome/browser/media_galleries/media_galleries_test_util.cc b/chrome/browser/media_galleries/media_galleries_test_util.cc
index c2a510db03edef7161159ed8c95a6b9cc57b2d44..d07e80c59971fb68af280b5bca47f635ccccd8ea 100644
--- a/chrome/browser/media_galleries/media_galleries_test_util.cc
+++ b/chrome/browser/media_galleries/media_galleries_test_util.cc
@@ -18,8 +18,6 @@
 #include "extensions/common/manifest_constants.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-namespace chrome {
-
 scoped_refptr<extensions::Extension> AddMediaGalleriesApp(
     const std::string& name,
     const std::vector<std::string>& media_galleries_permissions,
@@ -100,5 +98,3 @@ void EnsureMediaDirectoriesExists::Init() {
   num_galleries_ = 3;
 #endif
 }
-
-}  // namespace chrome