Add tests for the browsing contexts
Update codes as review suggestions

1. Change the document charset
2. Change the to xhtml
3. Remove help link
4. BackCompat test and etc

Signed-off-by: xiaojunwu <xiaojunx.a.wu@intel.com>
Remove the doctype of xhtml
Tests for the window's frameElement attribute
Update according to review suggestions
Resolve issues

1. Merge frameelement-02.html into ~-01.html
2. Use Pipe as review suggestion to get a dynamic url

Signed-off-by: xiaojunwu <xiaojunx.a.wu@intel.com>
Remove the end </embed> tag
Do the testing right after the iframe element is appended
Rename the test filename frameElement.sub.html
tests for callbacks attached and changed
adding missing resource file
refactoring 'move' test according to Dominic's notes
Remove doctype and update feedline characters
Remove the </iframe> tag and replace the line feed characters
cc Updated messages.json file.
refactoring tests according to Dominic's notes
cc Added some meta@name tests. Merges PR #707.
Fix CORS test to use stash correctly
fixup! Fix CORS test to use stash correctly
Merge pull request #834 from w3c/jgraham/cors_stash_fix

Fix CORS use of stash
Give XHR test some titles.