introduce web_components pkg for consolidated polyfills

pkg/shadow_dom/tool/conf/karma.conf.js

-// Sample Karma configuration file, that contain pretty much all the available options
-// It's used for running client tests on Travis (http://travis-ci.org/#!/karma-runner/karma)
-// Most of the options can be overriden by cli arguments (see karma --help)
-//
-// For all available config options and default values, see:
-// https://github.com/karma-runner/karma/blob/stable/lib/config.js#L54
-
-
-// base path, that will be used to resolve files and exclude
-basePath = '../';
-
-// list of files / patterns to load in the browser
-files = [
-  'tools/test/mocha-htmltest.js',
-  'conf/mocha.conf.js',
-  'node_modules/chai/chai.js',
-  'shadowdom.js',
-  'test/test.main.js',
-  {pattern: 'src/**/*.js', included: false},
-  {pattern: 'test/**/*.js', included: false},
-  {pattern: 'test/**/*.html', included: false},
-  {pattern: 'tools/**/*.js', included: false}
-];
-
-// list of files to exclude
-exclude = [];
-
-frameworks = ['mocha'];
-
-// use dots reporter, as travis terminal does not support escaping sequences
-// possible values: 'dots', 'progress', 'junit', 'teamcity'
-// CLI --reporters progress
-reporters = ['progress'];
-
-// web server port
-// CLI --port 9876
-port = 9876;
-
-// cli runner port
-// CLI --runner-port 9100
-runnerPort = 9100;
-
-// enable / disable colors in the output (reporters and logs)
-// CLI --colors --no-colors
-colors = true;
-
-// level of logging
-// possible values: LOG_DISABLE || LOG_ERROR || LOG_WARN || LOG_INFO || LOG_DEBUG
-// CLI --log-level debug
-logLevel = LOG_INFO;
-
-// enable / disable watching file and executing tests whenever any file changes
-// CLI --auto-watch --no-auto-watch
-autoWatch = true;
-
-// Start these browsers, currently available:
-// - Chrome
-// - ChromeCanary
-// - Firefox
-// - Opera
-// - Safari (only Mac)
-// - PhantomJS
-// - IE (only Windows)
-// CLI --browsers Chrome,Firefox,Safari
-browsers = ['ChromeCanary'];
-
-// If browser does not capture in given timeout [ms], kill it
-// CLI --capture-timeout 5000
-captureTimeout = 50000;
-
-// Auto run tests on start (when browsers are captured) and exit
-// CLI --single-run --no-single-run
-singleRun = true;
-
-// report which specs are slower than 500ms
-// CLI --report-slower-than 500
-reportSlowerThan = 500;
-
-// compile coffee scripts
-preprocessors = {
-};
-
-plugins = [
-  'karma-mocha',
-  'karma-chrome-launcher',
-  'karma-firefox-launcher',
-  'karma-script-launcher',
-  'karma-crbot-reporter'
-]