Dispose of DOMTimer upon explicit ExecutionContext unregistration.

Follow up on r186385 and explicitly dispose&stop a DOMTimer when it is
removed from its associated ExecutionContext. Needed for Oilpan, as the
now-GCed object will only later be finalized.

R=haraken
BUG=340522

Review URL: https://codereview.chromium.org/766183004

git-svn-id: svn://svn.chromium.org/blink/trunk@186425 bbb929c8-8fbe-4397-9dbb-9b2b20218538
3 files changed
tree: 1bd0b10f7eaff93f6856119fd9ed712f5ed367ab
  1. third_party/