Handle nonexistent images in CanvasRenderingContext2D.createPattern()

Cargo.lock

@@ -5754,7 +5754,7 @@ dependencies = [
 [[package]]
 name = "surfman-chains"
 version = "0.3.0"
-source = "git+https://github.com/asajeffrey/surfman-chains?branch=multi#80a71b1a2df71ae70c3c194d0af40b8ebf72968a"
+source = "git+https://github.com/asajeffrey/surfman-chains?branch=multi#e775b8c7807659958a4f20cf8e6eca4290f35124"
 dependencies = [
  "euclid",
  "fnv",

components/script/dom/htmlimageelement.rs

@@ -167,13 +167,10 @@ impl HTMLImageElement {
     // https://html.spec.whatwg.org/multipage/#check-the-usability-of-the-image-argument
     pub fn is_usable(&self) -> Fallible<bool> {
         // If image has an intrinsic width or intrinsic height (or both) equal to zero, then return bad.
-        match &self.current_request.borrow().image {
+        if let Some(image) = &self.current_request.borrow().image {
-            Some(image) => {
             if image.width == 0 || image.height == 0 {
                 return Ok(false);
             }
-            },
-            None => return Ok(false),
         }
 
         match self.current_request.borrow().state {

tests/wpt/metadata-layout-2020/2dcontext/drawing-images-to-the-canvas/2d.drawImage.broken.html.ini

@@ -0,0 +1,4 @@
+[2d.drawImage.broken.html]
+  [Canvas test: 2d.drawImage.broken]
+    expected: FAIL
+

tests/wpt/metadata-layout-2020/2dcontext/fill-and-stroke-styles/2d.pattern.image.broken.html.ini

@@ -0,0 +1,4 @@
+[2d.pattern.image.broken.html]
+  [Canvas test: 2d.pattern.image.broken]
+    expected: FAIL
+

tests/wpt/metadata-layout-2020/2dcontext/fill-and-stroke-styles/2d.pattern.image.nonexistent.html.ini

@@ -1,4 +0,0 @@
-[2d.pattern.image.nonexistent.html]
-  [Canvas test: 2d.pattern.image.nonexistent]
-    expected: FAIL
-

tests/wpt/metadata-layout-2020/2dcontext/fill-and-stroke-styles/2d.pattern.image.zeroheight.html.ini

@@ -0,0 +1,4 @@
+[2d.pattern.image.zeroheight.html]
+  [Canvas test: 2d.pattern.image.zeroheight]
+    expected: FAIL
+

tests/wpt/metadata-layout-2020/2dcontext/fill-and-stroke-styles/2d.pattern.image.zerowidth.html.ini

@@ -0,0 +1,4 @@
+[2d.pattern.image.zerowidth.html]
+  [Canvas test: 2d.pattern.image.zerowidth]
+    expected: FAIL
+

tests/wpt/metadata/2dcontext/drawing-images-to-the-canvas/2d.drawImage.broken.html.ini

@@ -0,0 +1,4 @@
+[2d.drawImage.broken.html]
+  [Canvas test: 2d.drawImage.broken]
+    expected: FAIL
+

tests/wpt/metadata/2dcontext/fill-and-stroke-styles/2d.pattern.image.broken.html.ini

@@ -0,0 +1,4 @@
+[2d.pattern.image.broken.html]
+  [Canvas test: 2d.pattern.image.broken]
+    expected: FAIL
+

tests/wpt/metadata/2dcontext/fill-and-stroke-styles/2d.pattern.image.nonexistent.html.ini

@@ -1,4 +0,0 @@
-[2d.pattern.image.nonexistent.html]
-  [Canvas test: 2d.pattern.image.nonexistent]
-    expected: FAIL
-

tests/wpt/metadata/2dcontext/fill-and-stroke-styles/2d.pattern.image.zeroheight.html.ini

@@ -0,0 +1,4 @@
+[2d.pattern.image.zeroheight.html]
+  [Canvas test: 2d.pattern.image.zeroheight]
+    expected: FAIL
+

tests/wpt/metadata/2dcontext/fill-and-stroke-styles/2d.pattern.image.zerowidth.html.ini

@@ -0,0 +1,4 @@
+[2d.pattern.image.zerowidth.html]
+  [Canvas test: 2d.pattern.image.zerowidth]
+    expected: FAIL
+