ServiceWorker: Make '.ready' return a promise to be resolved with ServiceWorkerRegistration (2/3)
Potential controllees need to observe version change events to make a ready
registration, but, before this patch, those events are sent not to potential
controllees but to pages that have the corresponding registration object
(to be more precise, pages that have the reference to the registration).
After this patch, ServiceWorkerProviderHost sends an IPC message to the
corresponding ServiceWorkerProviderContext when the host gets associated with
a registration and the provider context retains a reference of the registration
so that the potential controllee can observe the version change events.
1) Blink: https://codereview.chromium.org/476043002/
2) Chromium: THIS PATCH
3) Blink: https://codereview.chromium.org/532653002/
BUG=399533
TEST=content_unittests --gtest_filter=ServiceWorker*
TEST=run_webkit_tests.py --debug http/tests/serviceworker/ (with the patch (3))
Review URL: https://codereview.chromium.org/477593007
Cr-Commit-Position: refs/heads/master@{#294147}
11 files changed
