Auto merge of #16361 - KuoE0:bug-1354000, r=heycam

Make stylo recognize -moz-crisp-edges keyword.

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See [Bug 1354000](https://bugzilla.mozilla.org/show_bug.cgi?id=1354000).

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- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix [Bug 1354000](https://bugzilla.mozilla.org/show_bug.cgi?id=1354000)

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- [X] These changes do not require tests because the they're in gecko.

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components/style/properties/longhand/inherited_box.mako.rs

@@ -70,13 +70,14 @@ ${helpers.single_keyword("color-adjust",
                          animation_type="none",
                          spec="https://drafts.csswg.org/css-color/#propdef-color-adjust")}
 
-<% image_rendering_custom_consts = { "crisp-edges": "CRISPEDGES" } %>
+<% image_rendering_custom_consts = { "crisp-edges": "CRISPEDGES",
+                                     "-moz-crisp-edges": "CRISPEDGES" } %>
 // According to to CSS-IMAGES-3, `optimizespeed` and `optimizequality` are synonyms for `auto`
 // And, firefox doesn't support `pixelated` yet (https://bugzilla.mozilla.org/show_bug.cgi?id=856337)
 ${helpers.single_keyword("image-rendering",
-                         "auto crisp-edges",
-                         extra_gecko_values="optimizespeed optimizequality",
-                         extra_servo_values="pixelated",
+                         "auto",
+                         extra_gecko_values="optimizespeed optimizequality -moz-crisp-edges",
+                         extra_servo_values="pixelated crisp-edges",
                          custom_consts=image_rendering_custom_consts,
                          animation_type="none",
                          spec="https://drafts.csswg.org/css-images/#propdef-image-rendering")}