Remove manifest.
Remove some pointless variables.
Simplify how the Blobs are constructed.
Fix typo.
Also test non-ASCII characters in the UTF-8 tests.
Initial import of Blink MediaSource tests.
Make resources paths absolute.
Add tests for the object element
Test Assertions: 7.5; 7.6; 7.7; 12.1
Code refactoring + pan-x pan-y symmetry test
SVG test + code refactoring
Update according to the review comments

1. Change the manual test to reference test
2. Refactor the events tests
3. Remove the usemap test
4. Update the test and assert descriptions and etc

Signed-off-by: xiaojunwu <xiaojunx.a.wu@intel.com>
Update according to review feedbacks
Updated test assertion number
Rewrite the object-fallback.html
Resolve issues
cc Added URL tests.
Merge branch 'tests' of https://github.com/ArtemAntonets/web-platform-tests-msft into ArtemAntonets-tests
New test: send-sync-blocks-async, related to Mozilla bug 697151
New test: send-sync-blocks-async, related to Mozilla bug 697151 (now w final linebreak)