| Index: Source/modules/serviceworkers/Cache.idl
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| diff --git a/Source/modules/serviceworkers/Cache.idl b/Source/modules/serviceworkers/Cache.idl
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| index 57e8e5306ce44c3f59feac8a1c103c1dd074fb63..00d6429aba7ef747762cb8f567892c3330989b2e 100644
 | 
| --- a/Source/modules/serviceworkers/Cache.idl
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| +++ b/Source/modules/serviceworkers/Cache.idl
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| @@ -8,6 +8,7 @@
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|      GarbageCollected,
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|      Exposed=ServiceWorker,
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|      RuntimeEnabled=ServiceWorkerCache,
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| +    TypeChecking=Interface,
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|  ] interface Cache {
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|    // FIXME: Blink doesn't support union types, we use overrides instead. See http://crbug.com/240176
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|  
 | 
| 
 |