* add new native_mate converters for base::Value
* fix converter swapping
* remove createDeepCopy from browser/api
* replace missing ListValue converter
* convert bulk of remaining createDeepCopy instances
* convert last remaining instances of createDeepCopy
* incremental progress and helper methods for value conversion
* convert Get and add template function for GetString
* final DictionaryValue method conversions
* remove usage of base::DictionaryValue in web_contents_preferences
* use IsEnabled helper where possible
* Update atom_api_web_view_manager.cc
