DevTools: disable filters bar when switching Timeline to flame chart mode
DevTools: disable filters bar when switching Timeline to flame chart mode

The filters status bar button gets disabled and the filters bar is hidden.

BUG=None

Review URL: https://codereview.chromium.org/713483002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@184974 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