Add audible, muted to Tab, c.t.query, c.t.update, and c.t.onUpdated where relevant

extensions/common/value_builder.h

Index: extensions/common/value_builder.h
diff --git a/extensions/common/value_builder.h b/extensions/common/value_builder.h
index cc1ac041efa8bdc616f93e24f43d8e26a9eea8e9..092fe7ba552af5890a86fb730d423e59638bc4c1 100644
--- a/extensions/common/value_builder.h
+++ b/extensions/common/value_builder.h
@@ -56,6 +56,9 @@ class DictionaryBuilder {
   // Can only be called once, after which it's invalid to use the builder.
   scoped_ptr<base::DictionaryValue> Build() { return dict_.Pass(); }
 
+  // Get the number of elements stored in the dictionary
+  long size() const { return dict_->size(); }

[not at google - send to devlin, 2015/03/16 18:11:56]

size_t

but this change might not be necessary

+
   // Immediately serializes the current state to JSON. Can be called as many
   // times as you like.
   std::string ToJSON() const;