[chromium] add content shell specific TestExpectations
https://bugs.webkit.org/show_bug.cgi?id=110710

Reviewed by Eric Seidel.

For now, add tests that pass on content shell but fail on DRT.
Next, I will file bugs for all the remaining failing tests and skip
them here to ease the transition from DRT.

* platform/chromium/ContentShellTestExpectations: Added.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@144034 268f45cc-cd09-0410-ab3c-d52691b4dbfc