canvas: Deallocate WebRender images on canvas
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r? @glennw
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[tidy] prevent duplicate json keys
Throws a tidy error when duplicated keys are present.

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webgl: Unlock WebRender by default by adding a readback based fallback to WebGL context creation.
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This should give us the chance to use WebRender by default in OSX.
r? @pcwalton
cc @glennw @larsbergstrom
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Rotate animation
Add rotation interpolation code for the case where their direction vectors are equal.
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This was making us fall in a loop where the start split was empty, but we didn't
ignore it because the current fragment had this flag, but then we treated it
differently depending on the white_space property.
Not totally sure this is the proper fix, but it makes sense to me. In case it
is:
Fixes#12369.
Implement Runnable::name() for ImageResponseHandlerRunnable
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Implement the name() method from the Runnable trait for ImageResponseHandlerRunnable.
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Improve performance of HTMLDivElement constructor
These changes address two sources of performance loss seen while profiling in #12354. #12358 and https://github.com/rust-lang/rust/issues/34727 are still the biggest offenders, however.
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Implements name method for FilerReader event from trait Runnable
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Implement Runnable trait name method for FireSimpleEventTask
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Implement Runnable trait name method for FireSimpleEventTask in `components/script/dom/htmlmediaelement.rs`.
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Add name method for Runnable trait in DedicatedMediaSourceFailureTask…
Add name method for Runnable trait in DedicatedMediaSourceFailureTask.
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Add ability to WPT-test file uploads and fetches, fixes#12322
Using `inputElem.selectFiles(["path1", "path2"])` in JavaScript with pref `dom.htmlinputelement.select_files.enabled` = `true` will simulate the effect of `inputElem.click()`.
See #12322 for more, also related to #12343.
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Spawn threads for requests in file manager
r? @Manishearth
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Use a stable compiler for build-geckolib
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Correct negative margins in centered table cells
Fixes the cell-filling links on @AelitaBot [queue viewer page](http://ec2-52-26-55-30.us-west-2.compute.amazonaws.com/).
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We’re about to switch to separate CARGO_TARGET_DIR (and different
compiler version) so we won’t be able to share build output with servo’s
"normal" build anyway.
Make network listener runnable cancellable
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This keeps scripts from executing after its script thread has been shut down.
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style: Add support to the animation shorthand and fix parsing of animation-name
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Part of #11916.
r? @SimonSapin
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Issue 8719: Add basic support for :active selector
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Added toggling of active state for element and parents on mousedown/mouseup. Active state is removed when mouseout. (hover)
- As with my other PR i'm struggling a bit with the automated testing. I've added a manual test case and found quirks-mode/active-and-hover-manual.html which - aside from also being a manual test, is functional in Firefox but does not render correctly in Servo.
- Not implemented: In Firefox, behaviour differs with a <!DOCTYPE HTML> and an anchor does not lose it's activation on mouseout; whereas a button does.
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