DevTools: Extenstions: use request.contentEncoded for GetRequestContent

BUG=309710

Review URL: https://codereview.chromium.org/652813005

git-svn-id: svn://svn.chromium.org/blink/trunk@184351 bbb929c8-8fbe-4397-9dbb-9b2b20218538
[DevTools] Drop "ui" module from toolbox.

BUG=none

Review URL: https://codereview.chromium.org/675753002

git-svn-id: svn://svn.chromium.org/blink/trunk@184355 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: fix changing of cursor while dragging

We used to change cursor upon drag on body only, but this now doesn't
have effect since we explicitly set cursor: default in .component-root.
So set the cursor explicitly both on the event target and body (the latter
is needed so that cursor change also has effect on the glass pane).

BUG=

Review URL: https://codereview.chromium.org/658723006

git-svn-id: svn://svn.chromium.org/blink/trunk@184356 bbb929c8-8fbe-4397-9dbb-9b2b20218538