* 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
* Don't use is_offscreen_dummy in MessageBox
* Don't use is_offscreen_dummy in DownloadManagerDelegate
* Don't use is_offscreen_dummy in CommonWebContentsDelegate
* Remove is_offscreen_dummy from NativeWindow
atom/browser/atom_javascript_dialog_manager.cc:39: Lines should be <= 80 characters long [whitespace/line_length] [2]
atom/browser/atom_javascript_dialog_manager.cc:39: If/else bodies with multiple statements require braces [readability/braces] [4]
atom/browser/atom_javascript_dialog_manager.cc:62: Lines should be <= 80 characters long [whitespace/line_length] [2]
atom/browser/atom_javascript_dialog_manager.cc:89: If/else bodies with multiple statements require braces [readability/braces] [4]
* This is to enable more browser-like behavior so that users who run third-party code
will not be DOS'ed with alerts and confirms. This is already handled like this
in most major browsers so this will greatly help these developers
