Have CanvasAsyncBlobCreator speculative idle tasks keep a weak 'this'.
If image encoding should be attempted done via idle tasks,
CanvasAsyncBlobCreator schedules an idle task along with a delayed
task on the main thread to check if the idle task has been scheduled
before too long. If not, the delayed task will handle the encoding
instead (still on the main thread.)
The idle tasks represent opportunistic work, and should not keep the
CanvasAsyncBlobCreator alive until they eventually do get to run.
Consequently, make them keep a weak 'this' reference.
This addresses leaks exposed by r399181.
R=
BUG=
NOTRY=true
Review-Url: https://codereview.chromium.org/2060153002
Cr-Commit-Position: refs/heads/master@{#399445}
1 file changed
