Check for element dependent components in DOMMatrix constructor

We should throw a SyntaxError for lengths which are not absolute. The
DOMMatrix spec pre-dates (or ignores) sign() and sibling-index(), but we
should also throw for numbers that rely on relative lengths or tree
counts.

This CL fixes the issue for tree counting functions, but only adds tests
for relative lengths inside sign().

Bug: 415838619
Change-Id: I56250ee63db207414247e3b246dbbc3d862117c5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6517597
Reviewed-by: Daniil Sakhapov 
Commit-Queue: Rune Lillesveen 
Cr-Commit-Position: refs/heads/main@{#1456995}

Author: lilles

css/geometry/DOMMatrix-001.html

@@ -113,6 +113,8 @@
             ['translateX    (5px)',
              'scale(2 2) translateX(5) translateY(5)',
              'scale(2, 2), translateX(5)  ,translateY(5)',
+             'scale(sign(1em))',
+             'scale(sibling-index())',
              'translateX(5em)',
              'translateX(5ex)',
              'translateX(5ch)',
@@ -130,10 +132,14 @@
              'translateX(5vmin)',
              'translateX(5vmax)',
              'translateX(5%)',
+             'translateX(calc(10px * sign(1em - 10px)))',
+             'translateX(calc(10px * sibling-index()))',
              'rotate(5)',
              'rotate(5, 5, 5)',
              'rotate(5, 5px, 5px)',
              'rotate(5deg, 5px, 5px)',
+             'rotate(calc(5deg * sign(1em - 10px)))',
+             'rotate(calc(5deg * sibling-index()))',
              ' ',
              '/**/',
              '\0',