[DevTools] Pause all InspectorFrontendAPI messages when being debugged.

In this patch, we rely on timers being suspended when debugging. This
allows to wrap all incoming messages in a setTimeout call to dispatch
themm later.

BUG=none

Review URL: https://codereview.chromium.org/432003003

git-svn-id: svn://svn.chromium.org/blink/trunk@179393 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: Websocket Frame View: unify UI.

UI is overcomplicated and looks different from other DevTools.

BUG=
NOTRY=true

Review URL: https://codereview.chromium.org/434893002

git-svn-id: svn://svn.chromium.org/blink/trunk@179394 bbb929c8-8fbe-4397-9dbb-9b2b20218538