Implement -moz-window-transform{,-origin} internal properties
This fixes [bug 1374178](https://bugzilla.mozilla.org/show_bug.cgi?id=1374178).
Note that the impl of `-moz-window-transform-origin` doesn't exactly match how it is implemented in Gecko. Specifically, that property doesn't accept depth value in Gecko, but it does in this impl. The depth value is simply dropped during conversion. This is because I don't think it's worth adding code for handling this internal property to make it as restrictive.
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Added implementation for itemprop and itemtype along with test files
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Created test file
Added the stub methods for itemprop and itemscope
Resolved html5ever dependency, added ItemScope and ItemProp attr
Resolving dependency
Added pref override on metadata attributes
Resetting to original state due to change in requirement
Reverted adding attributes
1. add a customized implementation of parse_plain_attribute
2. add the following methods to HTMLElement.webidl
added itemprop and itemtype, enabled pref in test
Added initial implementation for getting itemprop property values
Adding the wireframe for testing
Implemented function to handle itemType
Corrected typo
Fixed typo bug in code
Handling duplicates for itemtype attribute values
Added the test suite structure
Added test for extra space
Added test for regular test values
Added test cases for Single property values
Test cases to check absence of itemtype and itemprop attributes
Added code to handle absence of itemtype or itemprop attributes
Added shell script to run all test cases
cleared up Cargo file
Tidying up
Removed the local test file
Removed new line for test-tidy
Ordered key in prefs.json
Fixes for test-tidy
Enabled test preferences
Created test using wpt
Creating WPT Tests for Regular and Single Prop Types
Fixed the Regular type test
Fixed tests
Removed old test case metadata
Incorporate review changes from PR
Updated MANIFEST to sync test cases
Making changed suggested in review
Removed editor folding
Removed unnecessary code
Resolving cargo conflicts
Updated PropertyNames and itemtypes implementation
Trying different data in test case
Updated manifest
Updated code based on reviews
fix overflow_y_is_visible() in `element.rs`
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I think the original logic of `overflow_y_is_visible()` might be wrong.
So fix it to the correct logic, and also pass more tests.
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A selector with combinators has to have length > 2 (a component, a combinator,
another component).
MozReview-Commit-ID: GvMEbRdOVi2
Signed-off-by: Emilio Cobos Álvarez <emilio@crisal.io>
style: Move font -moz-script-level outside of mako
This is a sub-PR of #19015
r? emilio
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