This can be used as a base actor for per-frame cross-process communication.

Would it be for Window (inner) or for WindowProxy (outer) or something else?

These actors continue to use the ThreadLink link backend, which should handle this situation well.

It seems when I added that code earlier, I missed this const. Depends on D4620

This will be useful as a basis for asynchronous actors which would like to exist both when crossing the process boundary (managed by PContent), and when displaying an in-process window. Depends on D4621

This actor can be used for communicating with individual frames, without depending on walking the tree in the content process. This is not yet complete. No tests have been written for it, the WindowGlobalParent objects need to be exposed to chrome JS, and a form of JS actors should be installed under them. In addition, BrowsingContextChrome objects should be updated to allow access to the current WindowGlobalParent in that context. Depends on D4622

Comment on attachment 9005068 [details] Bug 1487249 - Part 2: Add a missing 'const' to URIUtils.h Andrew McCreight (busy) [:mccr8] has approved the revision.

Comment on attachment 9005070 [details] Bug 1487249 - Part 3: Add the WindowGlobal actor representing a single window global Boris Zbarsky [:bzbarsky, bz on IRC] has approved the revision.

Comment on attachment 9005069 [details] Bug 1487249 - Part 2: Add a new PInProcess actor to manage intra-thread actors Andrew McCreight [:mccr8] has approved the revision.

Comment on attachment 9005067 [details] Bug 1487249 - Part 1: Allow MessageChannel objects to be created within a thread Andrew McCreight [:mccr8] has approved the revision.

Pushed by nika@thelayzells.com: https://hg.mozilla.org/integration/mozilla-inbound/rev/176131b18cb4 Part 1: Allow MessageChannel objects to be created within a thread, r=mccr8 https://hg.mozilla.org/integration/mozilla-inbound/rev/8caf55928df2 Part 2: Add a new PInProcess actor to manage intra-thread actors, r=mccr8 https://hg.mozilla.org/integration/mozilla-inbound/rev/160a1dbe0be5 Part 3: Add the WindowGlobal actor representing a single window global, r=bzbarsky

Backed out 9 changesets (bug 1500948, bug 1500949, bug 1448426, bug 1487249, bug 1500950, bug 1500944) for causing talos crashes on ts_paint | application crashed [@ MOZ_CrashOOL(char const*, int, char const*)] Backout revision https://hg.mozilla.org/integration/mozilla-inbound/rev/c12b84f575c3fe48d72f3c8c24a54b3dee1cc985 Failed push https://treeherder.mozilla.org/#/jobs?repo=mozilla-inbound&resultStatus=testfailed%2Cbusted%2Cexception&classifiedState=unclassified&revision=429776feea6ba796345ef7e41b9c9d367335ef62 Failure log: https://treeherder.mozilla.org/logviewer.html#?job_id=213326943&repo=mozilla-inbound https://treeherder.mozilla.org/logviewer.html#?job_id=213331977&repo=mozilla-inbound :Nika Layzell Cold you please take a look?

Pushed by nika@thelayzells.com: https://hg.mozilla.org/integration/mozilla-inbound/rev/3cd10aba9130 Part 1: Allow MessageChannel objects to be created within a thread, r=mccr8 https://hg.mozilla.org/integration/mozilla-inbound/rev/0190d4ffa54f Part 2: Add a new PInProcess actor to manage intra-thread actors, r=mccr8 https://hg.mozilla.org/integration/mozilla-inbound/rev/c60fa11538db Part 3: Add the WindowGlobal actor representing a single window global, r=bzbarsky

Backed out 13 changesets (bug 1500948, bug 1509362, bug 1509591, bug 1448426, bug 1500949, bug 1487249, bug 1509930, bug 1500950, bug 1500944) for causing crashes and assertion failures on PBackgroundParent.cpp:696 CLOSED TREE Backout revision https://hg.mozilla.org/integration/mozilla-inbound/rev/9bfe29337ffe3d93cd060077e2e999e72bb9b7cf Failed push https://treeherder.mozilla.org/#/jobs?repo=mozilla-inbound&resultStatus=testfailed%2Cbusted%2Cexception&classifiedState=unclassified&selectedJob=214255312&revision=c3fe435e473a463fbc22d4afa531bdedb757079c Failure logs: https://treeherder.mozilla.org/logviewer.html#?job_id=214255312&repo=mozilla-inbound https://treeherder.mozilla.org/logviewer.html#?job_id=214255794&repo=mozilla-inbound https://treeherder.mozilla.org/logviewer.html#?job_id=214249038&repo=mozilla-inbound https://treeherder.mozilla.org/logviewer.html#?job_id=214249630&repo=mozilla-inbound :Nika Layzell Could you please take a look?

Pushed by nika@thelayzells.com: https://hg.mozilla.org/integration/mozilla-inbound/rev/a6604d042a96 Part 1: Allow MessageChannel objects to be created within a thread, r=mccr8 https://hg.mozilla.org/integration/mozilla-inbound/rev/ba592aebdba2 Part 2: Add a new PInProcess actor to manage intra-thread actors, r=mccr8 https://hg.mozilla.org/integration/mozilla-inbound/rev/7a1bb48d843f Part 3: Add the WindowGlobal actor representing a single window global, r=bzbarsky

Backed out for causing bug 1485566 to permafail Push with failures: https://treeherder.mozilla.org/#/jobs?repo=mozilla-inbound&selectedJob=215440693&revision=788d4d99984316782178133ba3bdab6b5742644a Failure log: https://treeherder.mozilla.org/logviewer.html#/jobs?job_id=215440693&repo=mozilla-inbound&lineNumber=9094 Backout: https://hg.mozilla.org/integration/mozilla-inbound/rev/62f498382b14816950a6568513354ecbabe05245

Pushed by nika@thelayzells.com: https://hg.mozilla.org/integration/mozilla-inbound/rev/8976adedb5cb Part 1: Allow MessageChannel objects to be created within a thread, r=mccr8 https://hg.mozilla.org/integration/mozilla-inbound/rev/222e2bcb25df Part 2: Add a new PInProcess actor to manage intra-thread actors, r=mccr8 https://hg.mozilla.org/integration/mozilla-inbound/rev/20554da7b303 Part 3: Add the WindowGlobal actor representing a single window global, r=bzbarsky

https://hg.mozilla.org/mozilla-central/rev/8976adedb5cb https://hg.mozilla.org/mozilla-central/rev/222e2bcb25df https://hg.mozilla.org/mozilla-central/rev/20554da7b303