Ensure forward progress in SVGSMILElement::ResolveInterval #20129
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With some unlucky combinations of parameters (timing and current time),
we could end up spinning in the resolve loop, (re)resolving the same
interval over and over, not making forward progress.
Guard against this by bumping the next "begin after" value by epsilon if
the resolved end is the same as the current "begin after".
Bug: 1021630
Change-Id: I71ba25cd423c24428f5d3f41f05fc83a2a1693cb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1901043
Reviewed-by: Philip Rogers <pdr@chromium.org>
Commit-Queue: Fredrik Söderquist <fs@opera.com>
Cr-Commit-Position: refs/heads/master@{#713370}