| Index: Source/core/animation/DocumentAnimation.idl
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| diff --git a/Source/core/animation/DocumentAnimation.idl b/Source/core/animation/DocumentAnimation.idl
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| index d2c2861c8b1befb6dc4fe6112c016f1ab8df0b5f..7e02888d405107dc9279d63c25bf539383a90d1f 100644
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| --- a/Source/core/animation/DocumentAnimation.idl
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| +++ b/Source/core/animation/DocumentAnimation.idl
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| @@ -2,8 +2,11 @@
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|  // Use of this source code is governed by a BSD-style license that can be
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|  // found in the LICENSE file.
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|  
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| +// https://w3c.github.io/web-animations/#extensions-to-the-document-interface
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| +
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|  [
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|      RuntimeEnabled=WebAnimationsAPI,
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|  ] partial interface Document {
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| +    // TODO(dstockwell): This should be a DocumentTimeline.
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|      readonly attribute AnimationTimeline timeline;
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|  };
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| 
 |