DevTools: WS frame view: improve time format.

Show time with ms precision. Add title with full time and date information.

BUG=436814

Review URL: https://codereview.chromium.org/761113002

git-svn-id: svn://svn.chromium.org/blink/trunk@186163 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: Fix flamechart titles after r185795

Make flamechart bar title staying on the screen when the bar is partially visible.

Review URL: https://codereview.chromium.org/764993003

git-svn-id: svn://svn.chromium.org/blink/trunk@186165 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Revert of DevTools: Migrate elements panel undo/redo shortcuts to declarative actions. (patchset #2 id:20001 of https://codereview.chromium.org/688513004/)

Reason for revert:
http://crbug.com/437391

Original issue's description:
> DevTools: Migrate elements panel undo/redo shortcuts to declarative actions.
> 
> R=apavlov
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=184991

TBR=vsevik@chromium.org
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/768773002

git-svn-id: svn://svn.chromium.org/blink/trunk@186166 bbb929c8-8fbe-4397-9dbb-9b2b20218538