commit b3a781795afd30e7c931ecf0a2276f76b411d58b
author ikilpatrick <ikilpatrick@chromium.org> Fri Jun 03 16:21:26 2016
committer Commit bot <commit-bot@chromium.org> Fri Jun 03 16:24:05 2016
tree ed9025b5883d75984cfe57a99952f248793ad18b
parent 6d4d84bd31ae2320fa22efe02d69e2dd3803c2d3

Previously the inheritance for WorkletGlobalScopes was:

core/workers/WorkerOrWorkletGlobalScope
  -> core/workers/MainThreadWorkletGlobalScope
  -> modules/worklet/WorkletGlobalScope

With ThreadedWorkletGlobalScope, not all global scopes will exist on the main thread.

MainThreadWorkletGlobalScope exists in core/workers as the MainThreadDebugger & friends need to access it's LocalFrame from core/

The new inheritance is:
core/workers/WorkerOrWorkletGlobalScope
  -> core/workers/WorkletGlobalScope
  -> core/workers/MainThreadWorkletGlobalScope

This moves WorkletGlobalScope into core and a few other classes. ThreadedWorkletGlobalScope will exist in modules and inherit from WorkletGlobalScope.

Implementation Doc:
https://docs.google.com/document/d/14hEO_BqQRBne3tBD2xghEEo02nz2csLqY4SS6x6rmjA/edit

BUG=567358

Review-Url: https://codereview.chromium.org/2029163002
Cr-Commit-Position: refs/heads/master@{#397722}