DevTools: NetworkPanel: remove obsolete expectation.
DevTools: NetworkPanel: remove obsolete expectation.

BUG=306228
TBR=loislo@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/646783004

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@183754 bbb929c8-8fbe-4397-9dbb-9b2b20218538

primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs