| Index: chrome/common/extensions/api/file_browser_private.idl
 | 
| diff --git a/chrome/common/extensions/api/file_browser_private.idl b/chrome/common/extensions/api/file_browser_private.idl
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| index 956963044288621681474ca5e5da5b455c50e91f..cfe5c27e0098485ba014504f6ffcc0a7e717fdb4 100644
 | 
| --- a/chrome/common/extensions/api/file_browser_private.idl
 | 
| +++ b/chrome/common/extensions/api/file_browser_private.idl
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| @@ -234,6 +234,9 @@ dictionary VolumeMetadata {
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|    // ID of the disk volume.
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|    DOMString volumeId;
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|  
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| +  // Id the provided file system (for proviided file systems).
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| +  DOMString? fileSystemId;
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| +
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|    // Extension providing this volume (for provided file systems).
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|    DOMString? extensionId;
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|  
 | 
| 
 |