Mark inspector/layers/layer-canvas-log.html as slow

BUG=451577
[email protected]
NOTRY=true

Review URL: https://codereview.chromium.org/1544413002

Cr-Commit-Position: refs/heads/master@{#366999}
diff --git a/third_party/WebKit/LayoutTests/ASANExpectations b/third_party/WebKit/LayoutTests/ASANExpectations
index ea5fc12..0978260e 100644
--- a/third_party/WebKit/LayoutTests/ASANExpectations
+++ b/third_party/WebKit/LayoutTests/ASANExpectations
@@ -110,3 +110,4 @@
 crbug.com/451577 [ Linux ] inspector/extensions/extensions-reload.html [ Slow ]
 crbug.com/451577 [ Linux ] inspector/extensions/extensions-resources.html [ Slow ]
 crbug.com/451577 [ Linux ] inspector/extensions/extensions-sidebar.html [ Slow ]
+crbug.com/451577 [ Linux ] inspector/layers/layer-canvas-log.html [ Slow ]