extentions_api.rb

require 'rubygems'
require 'json'
require 'open-uri'

data = JSON.parse open('http://src.chromium.org/viewvc/chrome/trunk/src/chrome/common/extensions/api/extension_api.json').read

res = []
data.each do |d|
  n = d['namespace']
  if d['properties']
    res << d['properties'].map {|key, value| "chrome.#{n}.#{key}" }
  end
  if d['functions']
    res << d['functions'].map {|key, value| "chrome.#{n}.#{key['name']}()" }
  end
  if d['events']
    res << d['events'].map {|key, value| "chrome.#{n}.#{key['name']} # event " }
  end
end

puts res.flatten.sort.join("\n")