tree 22b93879c08beb4b4f21a6477d1fbcac08dddae8
parent d6fdbabd2769af951b0d8a284a2485a8e39df8f9
author xlai <xlai@chromium.org> 1469554370 -0700
committer Commit bot <commit-bot@chromium.org> 1469554475 +0000

Add WorkerSettings to expose certain flag values in WorkerGlobalScope

Currently, Settings() can only be accessed from main thread. So I introduce
WorkerSettings to WorkerClients, such that when WorkerGlobalScope is started,
certain flag values can be passed on to be exposed in worker.

Right now, there is only one flag disableReadingFromCanvas in WorkerSettings (
OffscreenCanvas requires access to the value of flag disableReadingFromCanvas in
order to determine the value of originClean(), regardless of being on main or
worker thread); but it will be convenient for other developers who want to add
more.

BUG=607575

Review-Url: https://codereview.chromium.org/2171563002
Cr-Commit-Position: refs/heads/master@{#407842}