Creates an isolated world for the given frame and returns an execution context for it.

Example:

puppeteer:protocol SEND ► {"sessionId":"x","method":"Page.createIsolatedWorld","params":{"frameId":"dddddd","grantUniveralAccess":true,"worldName":"__puppeteer_utility_world__"},"id":14}
puppeteer:protocol ◀ RECV {"method":"Runtime.executionContextCreated","params":{"context":{"id":2,"origin":"","name":"__puppeteer_utility_world__","auxData":{"isDefault":false,"type":"isolated","frameId":"dddddd"}}},"sessionId":"x"}
puppeteer:protocol ◀ RECV {"id":14,"result":{"executionContextId":2},"sessionId":"x"}

This is why gutenberg tests hang in test setup at Puppeteer methods like Page.focus and Page.click. Every Puppeteer Frame has two DOMWorlds, "main" and "secondary". The secondary is created in FrameManager._ensureIsolatedWorld as mentioned in https://bugzilla.mozilla.org/show_bug.cgi?id=1587452#c1

Since we don't implement Page.createIsolatedWorld yet, we never create an execution context for the secondary world and so Puppeteer hangs waiting for that execution context. Puppeteer Page methods like click, focus, select, hover, tap all rely on the secondary world.

It looks like it was added in https://github.com/GoogleChrome/puppeteer/issues/2671

There is an empty function in https://searchfox.org/mozilla-central/source/remote/domains/content/Page.jsm#120

Speaking to Andreas there is an example in Runtime.jsm https://searchfox.org/mozilla-central/source/remote/domains/content/Runtime.jsm

According to the CDP viewer, the type of FrameId is string.

Depends on D55165

Depends on D55166

Dismantle the assumption that there is one ExecutionContext per
inner window and generate a fresh id for each ExecutionContext
rather than reusing the inner window id.

As a bonus, also emit Runtime.executionContextsCleared.

Depends on D55167

This does not support the grantUniversalAccess parameter.
It just creates a new execution context.

Depends on D55168

As noted in Bug 1602083, the CDP viewer implies that execution context management
is independent of the Runtime domain, which makes sense with the behaviour of methods
like Page.createIsolatedWorld.

This is a first step in that direction.

Depends on D55168

Depends on D55168

https://hg.mozilla.org/mozilla-central/rev/f2d4096ee285
https://hg.mozilla.org/mozilla-central/rev/4a9491dbf5b1
https://hg.mozilla.org/mozilla-central/rev/ca7c88a4a9e3
https://hg.mozilla.org/mozilla-central/rev/c6be67f53106
https://hg.mozilla.org/mozilla-central/rev/8e0ad3f91d48
https://hg.mozilla.org/mozilla-central/rev/2bf39a9a1a78