Remove the layout timer

As discussed on blink-dev, we want to remove the layout timer
in order to better synchronize work with the compositor.
Prior to this CL, we'd trigger layout at arbitrary times,
which meant we could end up doing layout multiple times per
frame unnecessarily.

BUG=340357

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=166415

Review URL: https://codereview.chromium.org/145663012

git-svn-id: svn://svn.chromium.org/blink/trunk@166545 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: Remove references to modules/websockets from core/inspector

BUG=340221

Review URL: https://codereview.chromium.org/150573009

git-svn-id: svn://svn.chromium.org/blink/trunk@166546 bbb929c8-8fbe-4397-9dbb-9b2b20218538