Auto merge of #18499 - heycam:rule-cache, r=emilio

Rule cache

<!-- Please describe your changes on the following line: -->
This adds a TLS-based cache reset styles structs keyed off rule nodes.  Reviewed in https://bugzilla.mozilla.org/show_bug.cgi?id=1367635 by me and Emilio.

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- [X] `./mach test-tidy` does not report any errors
- [ ] These changes fix #__ (github issue number if applicable).

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- [ ] There are tests for these changes OR
- [ ] These changes do not require tests because _____

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components/style/properties/helpers.mako.rs

@@ -316,6 +316,13 @@
                 _ => panic!("entered the wrong cascade_property() implementation"),
             };
 
+            context.for_non_inherited_property =
+                % if property.style_struct.inherited:
+                    None;
+                % else:
+                    Some(LonghandId::${property.camel_case});
+                % endif
+
             % if not property.derived_from:
                 match value {
                     DeclaredValue::Value(specified_value) => {
@@ -324,6 +331,10 @@
                                 longhands::system_font::resolve_system_font(sf, context);
                             }
                         % endif
+                        % if not property.style_struct.inherited and property.logical:
+                            context.rule_cache_conditions.borrow_mut()
+                                .set_writing_mode_dependency(context.builder.writing_mode);
+                        % endif
                         % if property.is_vector:
                             // In the case of a vector property we want to pass
                             // down an iterator so that this can be computed
@@ -375,6 +386,9 @@
                         CSSWideKeyword::Unset |
                         % endif
                         CSSWideKeyword::Inherit => {
+                            % if not property.style_struct.inherited:
+                                context.rule_cache_conditions.borrow_mut().set_uncacheable();
+                            % endif
                             % if property.ident == "font_size":
                                 longhands::font_size::cascade_inherit_font_size(context);
                             % else: