GitLab

Callbacks can cause the ChildSharedBitmapManager to be used after the compositor is gone, so pass the ThreadSafeSender (which is refcounted) to the callbacks instead.

BUG=390563

Review URL: https://codereview.chromium.org/382133002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@282729 0039d316-1c4b-4281-b951-d872f2087c98