Convert most of extensions and some other random stuff to using the base namespace for Values.

gpu/config/gpu_control_list.cc

Index: gpu/config/gpu_control_list.cc
diff --git a/gpu/config/gpu_control_list.cc b/gpu/config/gpu_control_list.cc
index 98d8233c4eeeef29ef210d0f23ff290630b17119..b7da59bb7abc39015e609e8ddab71022fd8587ac 100644
--- a/gpu/config/gpu_control_list.cc
+++ b/gpu/config/gpu_control_list.cc
@@ -1189,7 +1189,7 @@ bool GpuControlList::LoadList(
     return false;
 
   base::DictionaryValue* root_dictionary =
-      static_cast<DictionaryValue*>(root.get());
+      static_cast<base::DictionaryValue*>(root.get());
   DCHECK(root_dictionary);
   return LoadList(*root_dictionary, os_filter);
 }