GitLab

Move WebSharedWorkerImpl to core/exported, which requires adding a
callback inside ModulesInitializer to create objects for various
classes in modules/ (LocalFileSystemClient and IndexedDBClient, and
moving both Impl files to modules/ as well). Also added a Create()
method for WebLocalFrame to WebFactory, and minor other required
changes.

This change moves the following classes out of web/:
- WebSharedWorkerImpl -> core/exported
- WebSharedWorkerReportingProxyImpl -> core/workers
- LocalFileSystemClient -> modules/filesystem
- IndexedDBClientImpl -> modules/indexeddb

Bug: 712963
Change-Id: I44b83f02342f179a71fdb15c0f889a0ab41dc878
Reviewed-on: https://chromium-review.googlesource.com/522503
Commit-Queue: Sasha Morrissey <sashab@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Stuart Langley <slangley@chromium.org>
Cr-Commit-Position: refs/heads/master@{#477575}