| Paint API should be available for same-origin frames but not to cross-origin/sandboxed frames. |
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| On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". |
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| PASS receivedEvent.source is document.getElementById('nonSandboxed').contentWindow |
| PASS receivedEntry.name is 'first-contentful-paint' |
| PASS didReceiveMessageFromSandboxedIframe is false |
| PASS Array.isArray(nonSandboxSupportedTypes) is true |
| PASS Array.isArray(sandboxSupportedTypes) is true |
| PASS didReceiveMessage is true |
| PASS nonSandboxSupportedTypes.includes("paint") is true |
| PASS sandboxSupportedTypes.includes("paint") is false |
| PASS PerformanceObserver first-contentful-paint callback was fired for same-origin frame but not for cross-origin frame |
| PASS successfullyParsed is true |
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| TEST COMPLETE |
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| TEXT |
