DevTools: maximize timeline range upon doubleclick

TBR=caseq

Review URL: https://codereview.chromium.org/28773004

git-svn-id: svn://svn.chromium.org/blink/trunk@159947 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Updating TestExpectations.

git-svn-id: svn://svn.chromium.org/blink/trunk@159950 bbb929c8-8fbe-4397-9dbb-9b2b20218538