Auto merge of #14013 - asajeffrey:script-thread-no-root-document, r=jdm

Script thread with no root document

<!-- Please describe your changes on the following line: -->

This PR removes the single root document from the script thread, and replaces it by a lookup table from `PipelineId`s to `Document`s. This is needed if we're going to share script threads, as per #633.

The last commit is the one that matters, the ones before are #13646.

cc @jdm @Ms2ger @ConnorGBrewster
---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: -->
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes do not require tests because refactoring

<!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. -->

<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/14013)
<!-- Reviewable:end -->
This commit is contained in:
bors-servo 2016-11-08 11:31:33 -06:00 committed by GitHub
commit d1b7f19410
8 changed files with 494 additions and 668 deletions

File diff suppressed because it is too large Load diff