Fix new wpt failures

1) Don't save border-box when it's default value.

2) Fix wpt test to accept both normalized and unnormalized path.

Fixed: 1455148
Change-Id: I99b62261f0e567af947274d939ef90c4e0bc904e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4614757
Commit-Queue: Daniil Sakhapov <sakhapov@chromium.org>
Reviewed-by: Anders Hartvoll Ruud <andruud@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1158758}

third_party/blink/renderer/core/css/properties/css_parsing_utils.cc

@@ -6652,7 +6652,9 @@ CSSValue* ConsumeOffsetPath(CSSParserTokenRange& range,
   if (offset_path) {
     list->Append(*offset_path);
   }
-  if (coord_box) {
+  if (!offset_path ||
+      (coord_box && To<CSSIdentifierValue>(coord_box)->GetValueID() !=
+                        CSSValueID::kBorderBox)) {
     list->Append(*coord_box);
   }
 

third_party/blink/web_tests/external/wpt/css/motion/parsing/offset-path-computed.html

@@ -90,7 +90,11 @@
 test_computed_value("offset-path", "inset(10% 20% 30% 40%) border-box", "inset(10% 20% 30% 40%)");
 test_computed_value("offset-path", "fill-box ellipse(at 50% 60%)", "ellipse(at 50% 60%) fill-box");
 test_computed_value("offset-path", "ray(0deg) stroke-box");
-test_computed_value("offset-path", 'path("m 20 0 h -100") view-box');
+// Mentionted above above.
+test_computed_value("offset-path", 'path("m 20 0 h -100") view-box', [
+    'path("M 20 0 H -80") view-box',
+    'path("m 20 0 h -100") view-box'
+]);
 </script>
 </body>
 </html>