Revert 162344 "NoOp Document::open shouldn't be reported to Insp..."

The test added by this patch is flakey. It appears to be timing
out or terminating early.

http://test-results.appspot.com/dashboards/flakiness_dashboard.html#group=%40ToT%20Blink&showExpectations=true&tests=http%2Ftests%2Finspector%2Fresource-tree%2Fresource-tree-write-to-open-document.html

> NoOp Document::open shouldn't be reported to Inspector.
> 
> Otherwise Inspector erroneously thinks that frame was navigated.
> 
> BUG=315618
> 
> Review URL: https://codereview.chromium.org/61643008

TBR=eustas@chromium.org

Review URL: https://codereview.chromium.org/78433002

git-svn-id: svn://svn.chromium.org/blink/trunk@162361 bbb929c8-8fbe-4397-9dbb-9b2b20218538