GitLab

This patch removes explicit delete and raw pointers and makes
ownership more clear by having WebSharedWorkerClient own
WebSharedWorker.

Change-Id: Ifd352b3effd9f2b46c9e61e792237ed3b6c2024a
Reviewed-on: https://chromium-review.googlesource.com/994893
Commit-Queue: Matt Falkenhagen <falken@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Reviewed-by: Hiroki Nakagawa <nhiroki@chromium.org>
Cr-Commit-Position: refs/heads/master@{#548036}