On a GLES or compatibility underlying GL context, we were fine because
an underlying renderbuffer object would just get re-created, and
nothing too bad happened because we aren't tracking the currently
bound renderbuffer at the DOM level. However, on a desktop GL core
context, binding non-genned or deleted names is an error.
Fixes a crash in object-deletion-behavior.html.
webgl: Fix validation of drawElements()'s type argument.
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webgl: Fix validation of drawElements()'s type argument.
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Fixes crash due to unexpected GL errors in gl-drawelements.html.
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style: Make WorkQueue creation fallible.
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Fixes bug 1290205 in bugzilla.
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Fix hit testing to take into account nested stacking contexts #12777
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Fixes#12833.
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Implement HTMLDataElement#value
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Implement HTMLDataElement#value
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Implements HTMLDialogElement#close
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Implements HTMLDialogElement#close according to [link](https://html.spec.whatwg.org/multipage/#the-dialog-element:dom-dialog-close)
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Fix ridiculous DOM proxy getter performance
This implements the missing shadowing checks that were causing us to take many slow paths when dealing with proxy objects. Verified by running `tests/html/binding_perf.html` before and after and observing a 12x improvement.
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