Fix bug bootstrapping stable rust
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Improve behaviour of image elements that perform multiple requests
This addresses cases where image elements end up making multiple requests, as well as makes the element respond to additional relevant mutations that trigger updating the image data.
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Deduplicate declarations on insertion, not at the end of parsing a block
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- [x] These changes fix#15558 (github issue number if applicable).
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Remove unused content blocker code.
I don't know what it is for, so I believe it would be better to remove it
entirely until and unless we start using it.
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Servo side of gecko bug 1343078: update bindinggen bits for the changes I'm making to Gecko atoms.
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s/IframeLoadEventSteps/IFrameLoadEventSteps/g
All the other IFrame* names have the capital "I" and capital "F", so I'm changing this to keep uniformity.
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removing mutHeapJs references
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- [x] These changes fix#15316
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