Add an explicit dispose step for WebDevToolsAgentImpl.

In order to provide an orderly shutdown of a WebViewImpl's
WebDevToolsAgentImpl object, add a dispose() step before clearing out
its reference. Delaying the dispose steps until WebDevToolsAgentImpl
is finalized, is incompatible with Oilpan.

R=haraken
BUG=451004

Review URL: https://codereview.chromium.org/996163002

git-svn-id: svn://svn.chromium.org/blink/trunk@191698 bbb929c8-8fbe-4397-9dbb-9b2b20218538
3 files changed
tree: c6d113639de503c5aaa032e3580b65d831a74528
  1. third_party/