| Index: third_party/WebKit/LayoutTests/imported/wpt/service-workers/service-worker/resources/empty-but-slow-worker.js
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| diff --git a/third_party/WebKit/LayoutTests/imported/wpt/service-workers/service-worker/resources/empty-but-slow-worker.js b/third_party/WebKit/LayoutTests/imported/wpt/service-workers/service-worker/resources/empty-but-slow-worker.js
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| new file mode 100644
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| index 0000000000000000000000000000000000000000..92abac7a384d5151252a5749533da5e914380e03
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| --- /dev/null
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| +++ b/third_party/WebKit/LayoutTests/imported/wpt/service-workers/service-worker/resources/empty-but-slow-worker.js
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| @@ -0,0 +1,8 @@
 | 
| +addEventListener('fetch', evt => {
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| +  if (evt.request.url.endsWith('slow')) {
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| +    // Performance.now() might be a bit better here, but Date.now() has
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| +    // better compat in workers right now.
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| +    let start = Date.now();
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| +    while(Date.now() - start < 2000);
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| +  }
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| +});
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| 
 |