Revert of DevTools: Make WebInspector.ConsoleMessage a pure model entity with no UI features (https://codereview.chromium.org/173693003/)

Reason for revert:
Broke devtools browser_tests, needs them updated, too

Original issue's description:
> DevTools: Make WebInspector.ConsoleMessage a pure model entity with no UI features
> 
> WebInspector.ConsoleMessage used to combine both model and UI aspects, thereby
> violating basic architectural principles.
> 
> ConsoleMessage.setMessageElement() has been removed because of this, and
> we also don't see great value in the profile name linkification.
> 
> R=eustas, pfeldman
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=167880

TBR=eustas@chromium.org,pfeldman@chromium.org
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/177383003

git-svn-id: svn://svn.chromium.org/blink/trunk@167901 bbb929c8-8fbe-4397-9dbb-9b2b20218538