Move RefCountedStaticMemory to base namespace

BUG=none
TEST=compiles

Review URL: http://codereview.chromium.org/10165020

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@133702 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/themes/theme_service.cc b/chrome/browser/themes/theme_service.cc
index 92cc1e8..c0225bd 100644
--- a/chrome/browser/themes/theme_service.cc
+++ b/chrome/browser/themes/theme_service.cc
@@ -5,6 +5,7 @@
 #include "chrome/browser/themes/theme_service.h"
 
 #include "base/bind.h"
+#include "base/memory/ref_counted_memory.h"
 #include "base/string_split.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"