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The text-runs break heuristic now considers the text style.
With this change, a text run will break if it encounters a difference
in the following text style properties:
* font-family
* font-weight
* rendering mode
* font-size
* fill color
* stroke color
* italic flag
* bold flag

Before this change, it used to break only if a font-size difference was
observed.

I added an "ultimate" dump test that tests for all of those properties.

Bug: 985604
Change-Id: Ice4b4a2dcdd8cc9642ca0e9d069a415c5b2700fd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1771987
Commit-Queue: Benjamin Beaudry <benjamin.beaudry@microsoft.com>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Ian Prest <iapres@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#710522}