Remove shared worker process related codes.

This CL removes
- switches::kWorkerProcess
- SANDBOX_TYPE_WORKER
- IDR_WORKER_SANDBOX_PROFILE

BUG=327256

Review URL: https://codereview.chromium.org/449333002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@288836 0039d316-1c4b-4281-b951-d872f2087c98
10 files changed