Cleanup inspector test expectations

BUG=344238,257132,280698,308952,333882,339252,313783,352466,351696
NOTRY=true

Review URL: https://codereview.chromium.org/221833004

git-svn-id: svn://svn.chromium.org/blink/trunk@170650 bbb929c8-8fbe-4397-9dbb-9b2b20218538