Main thing: Making contextMenus implementation webext-oop compatible.
Preparation:
- Add getParentEvent to ChildAPIManager to allow use of remote events.
- Introduce `addon_parent_only` to "allowedContexts" to only generate a
schema API in the main process.
- Do not fill in `null` for missing keys if the schema declares a key as
`"optional": "omit-key-if-missing"`. This is needed for the second
point in the next list.
Drive-by fixes:
- Ensure that the "onclick" handler is erased when a context closes.
- Do not clear the "onclick" handler in `contextMenus.update` if the
onclick key has been omitted (parity with Chrome).
- Remove some unnecessary `Promise.resolve()`
- Add extensive set of tests that check the behavior of the contextMenus
APIs with regards to the onclick attribute in various scenarios.
MozReview-Commit-ID: A5f3AUQzU8T
And remove redundant `Promise.resolve()` because it is the default
for async functions.
setIcon is not supported on Android, so there was no need to change
mobile/android/components/extensions/ext-pageAction.js.
MozReview-Commit-ID: 94ebaJFxLAi
- Use the frame's message manager to direct messages via the
ProxyMessenger to the right tab instead of directly to the tab.
- Put the implementation in a separate file that is only loaded in
child processes (in the future).
- Explicitly list all addon-process specific files in a new category
instead of reusing the content one.
MozReview-Commit-ID: 8oIMx9ol7Tl
