[Typed CSSOM] New design for computed styles which includes custom properties

third_party/WebKit/LayoutTests/typedcssom/computedstyle/computedStylePropertyMap.html

Index: third_party/WebKit/LayoutTests/typedcssom/computedstyle/computedStylePropertyMap.html
diff --git a/third_party/WebKit/LayoutTests/typedcssom/computedstyle/computedStylePropertyMap.html b/third_party/WebKit/LayoutTests/typedcssom/computedstyle/computedStylePropertyMap.html
index 8f3fb6dba26f5fa9b5523ff197c8693b0773f661..dc9dfd89efb83fdb05ab259cd13658c3fad5ad0c 100644
--- a/third_party/WebKit/LayoutTests/typedcssom/computedstyle/computedStylePropertyMap.html
+++ b/third_party/WebKit/LayoutTests/typedcssom/computedstyle/computedStylePropertyMap.html
@@ -37,6 +37,10 @@ test(function() {
 }, 'Unsupported and unserializable property returns null.');
 
 test(function() {
+  assert_throws(null, function() { computedStyleMap.get('bananas'); });
+}, 'get() throws for an invalid property.');
+
+test(function() {
   assert_false(computedStyleMap.has('max-zoom'));
 }, 'has() return false for an unsupported property.');

[alancutter (OOO until 2018), 2017/04/05 05:00:16]

max-zoom is technically a descriptor, not a property. If you eventually expose
Typed OM for style rules I would expect max-zoom to work for viewport at-rules.
https://developer.mozilla.org/en/docs/Web/CSS/@viewport