Bump base64 to 0.4.2
<!-- Please describe your changes on the following line: -->
we have just released a security patch for base64 (preventing integer overflow when sizing a buffer for encoded output). this bumps the version in the three Cargo.toml files that pull it in. there should be no observable difference in behavior, no non-malicious input should be able to trigger this state
---
<!-- 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
- [ ] These changes fix #__ (github issue number if applicable).
<!-- Either: -->
- [ ] There are tests for these changes OR
- [X] These changes do not require tests because it is a small fix to a dependency with no practical difference in operation from previous.
<!-- Also, please make sure that "Allow edits from maintainers" checkbox is checked, so that we can help you if you get stuck somewhere along the way.-->
<!-- 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/16706)
<!-- Reviewable:end -->
This part includes making stroke-linecap, stroke-linejoin, stroke-miterlimit,
stroke-opacity, and stroke-dasharray animatable.
For properties that already implemented Interpolate trait and clone() for
glue code, we can just make them animatable by replacing the animation_value_type
with proper type name. So, set animation_value_type to 'discrete' for
stroke-linecap and stroke-linejoin. Set animation_value_type to 'ComputedValue'
for stroke-miterlimit and stroke-opacity.
As to stroke-dasharray, we need to implement Interpolate trait and glue codes
for it.
Stylo: Implement {specified|computed}::LayerImage.
<!-- Please describe your changes on the following line: -->
Bug 1359787 - Stylo: Unite the implementation of background-image/ mask-image and border-image-source in {background|svg|border}.mako.rs
---
<!-- 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
- [ ] These changes fix #__ (github issue number if applicable).
<!-- Either: -->
- [ ] There are tests for these changes OR
- [ ] These changes do not require tests because _____
<!-- Also, please make sure that "Allow edits from maintainers" checkbox is checked, so that we can help you if you get stuck somewhere along the way.-->
<!-- 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/16707)
<!-- Reviewable:end -->
Fix unsafe Heap constructor usage in DOM objects
<!-- Please describe your changes on the following line: -->
See https://github.com/servo/rust-mozjs/issues/343#issuecomment-294513870
Heap::new() constructor is unsafe. Heap should be set after reflect_dom_object call in order to prevent potential GC crashes.
<!-- 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
- [ ] These changes fix #__ (github issue number if applicable).
<!-- Either: -->
- [x] There are tests for these changes OR
- [ ] These changes do not require tests because _____
<!-- Also, please make sure that "Allow edits from maintainers" checkbox is checked, so that we can help you if you get stuck somewhere along the way.-->
<!-- 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/16500)
<!-- Reviewable:end -->
font-feature-settings gecko glue code
<!-- Please describe your changes on the following line: -->
FeatureTagValue value property changed to use u32. ToCss for
FeatureTagValue changed to allow conversion from u32 to string. Parse
for the same struct updated to convert from string to u32. Added two
functions to transfer settings to gecko and copy settings.
---
<!-- 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 fix#15975 (github issue number if applicable).
<!-- Either: -->
- [X] There are tests for these changes OR
- [ ] These changes do not require tests because _____
<!-- Also, please make sure that "Allow edits from maintainers" checkbox is checked, so that we can help you if you get stuck somewhere along the way.-->
<!-- 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/16568)
<!-- Reviewable:end -->
FeatureTagValue value property changed to use u32. ToCss for
FeatureTagValue changed to allow conversion from u32 to string. Parse
for the same struct updated to convert from string to u32. Added two
functions to transfer settings to gecko and copy settings.
Changed all prefixes from DOMString to the atomic Prefix from html5ever
<!-- Please describe your changes on the following line: -->
I just changed the `prefix` parameters on the constructors of several HTML elements. The type now is `Option<Prefix>`. I also changed the sizes of the `sizeof.rs` unit test to match the new values.
---
<!-- 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 fix#16700 (github issue number if applicable).
<!-- Either: -->
- [ ] There are tests for these changes OR
- [X] These changes do not require tests because it should not affect anything else
<!-- Also, please make sure that "Allow edits from maintainers" checkbox is checked, so that we can help you if you get stuck somewhere along the way.-->
<!-- 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/16712)
<!-- Reviewable:end -->
stylo: Bug 1346052 - Add Servo_AnimationValue_Compute.
This is an interdependent patch of Bug 1346052. We need this FFI to compute the AnimationValue from a property id and a string, so nsDOMWindowUtils::ComputeAnimationDistance() can use this FFI to get the AnimationValue.
---
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix [Bug 1346052](https://bugzilla.mozilla.org/show_bug.cgi?id=1346052).
- [X] These changes do not require tests because we have some tests for this in Gecko.
<!-- 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/16704)
<!-- Reviewable:end -->
This is a verbatim copy of the source at [1]. It won't compile on stable rust,
but I'm including it here to make the changes clear.
[1] https://doc.rust-lang.org/src/alloc/arc.rs.html
MozReview-Commit-ID: XEbOK4fXQX
Make stylo support mozmm unit
<!-- Please describe your changes on the following line: -->
This issue is reported at https://bugzilla.mozilla.org/show_bug.cgi?id=1356104. Mozmm is defined at https://developer.mozilla.org/zh-TW/docs/Web/CSS/length.
---
<!-- 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 fix [Bug 1356104](https://bugzilla.mozilla.org/show_bug.cgi?id=1356104)
<!-- Either: -->
- [ ] There are tests for these changes OR
- [X] These changes do not require tests because the tests already exist in Gecko.
<!-- Also, please make sure that "Allow edits from maintainers" checkbox is checked, so that we can help you if you get stuck somewhere along the way.-->
<!-- 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/16688)
<!-- Reviewable:end -->
