[DevTools] Make Timeline tests use only model records

All places where raw TimelineAgent.Record was used are fixed.

BUG=403684,398785

Review URL: https://codereview.chromium.org/461323003

git-svn-id: svn://svn.chromium.org/blink/trunk@180270 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Unindent namespace content of WebElement.h, WebFormElement.h, and WebInputElement.h

These are the last instances of namespace indentation in public/.

BUG=none
TEST=none; no behavior changes.

Review URL: https://codereview.chromium.org/476633002

git-svn-id: svn://svn.chromium.org/blink/trunk@180271 bbb929c8-8fbe-4397-9dbb-9b2b20218538