Remove manifest.
Remove some pointless variables.
Simplify how the Blobs are constructed.
Fix typo.
Also test non-ASCII characters in the UTF-8 tests.
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
Put authorship information into IndexedDB test files
Updated test assertion number
Rewrite the object-fallback.html
Resolve issues
Add more tests for IDBIndex getKey
Fix open issues
Remove 'oncomplete' callback
Merge branch 'tests' of https://github.com/ArtemAntonets/web-platform-tests-msft into ArtemAntonets-tests
Processed comments for constructor, pointerout_after_pointercancel,
pointerout_after_pointerup, pointerout_pen and also indentation fix