| Index: Source/modules/serviceworkers/Headers.idl
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| diff --git a/Source/modules/serviceworkers/Headers.idl b/Source/modules/serviceworkers/Headers.idl
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| index 0db7152bd60f7ed0f2a3e861d2b6a4fdbee32ad0..20fcb67517df6a744a07b80f04a71423050a0788 100644
 | 
| --- a/Source/modules/serviceworkers/Headers.idl
 | 
| +++ b/Source/modules/serviceworkers/Headers.idl
 | 
| @@ -14,6 +14,7 @@ typedef Dictionary OpenEndedDictionary;
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|      Exposed=ServiceWorker,
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|      RaisesException=Constructor,
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|      GarbageCollected,
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| +    TypeChecking=Interface,
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|  ] interface Headers {
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|      [RaisesException] void append(ByteString name, ByteString value);
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|      [ImplementedAs=remove, RaisesException] void delete(ByteString key);
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| 
 |