Remove confusing comment

Obviously the file mentioned in the comment is gone.

NOTRY=true

Review URL: https://codereview.chromium.org/82583007

git-svn-id: svn://svn.chromium.org/blink/trunk@162575 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Hide and destroy inspector overlay page when profiling

InspectorOverlay page may affect performance of profiled application (especially on android, see the bug). The solution is to delete the page before starting profiling and restore it when profiling is done.

BUG=321194

Review URL: https://codereview.chromium.org/83123008

git-svn-id: svn://svn.chromium.org/blink/trunk@162576 bbb929c8-8fbe-4397-9dbb-9b2b20218538