Disable SpeedIndexImplTest.testVideoCompleteness on cros.

BUG=334841
TEST=manual

Review URL: https://codereview.chromium.org/138963007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245514 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245514
In a chromium checkout, compile d8 for the host toolset

It's required during compilation on the host for webui tests

BUG=331585
R=machenbach@chromium.org

Review URL: https://codereview.chromium.org/132233018

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245515 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245515