Move base/values.h into the base namespace.

chrome/common/extensions/extension_unpacker.h

Index: chrome/common/extensions/extension_unpacker.h
===================================================================
--- chrome/common/extensions/extension_unpacker.h	(revision 91508)
+++ chrome/common/extensions/extension_unpacker.h	(working copy)
@@ -13,9 +13,14 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/tuple.h"
 
-class DictionaryValue;
 class SkBitmap;
 
+namespace base {
+class DictionaryValue;
+}
+
+using base::DictionaryValue;
+
 // This class unpacks an extension.  It is designed to be used in a sandboxed
 // child process.  We unpack and parse various bits of the extension, then
 // report back to the browser process, who then transcodes the pre-parsed bits