| Index: Source/core/frame/Location.idl
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| diff --git a/Source/core/frame/Location.idl b/Source/core/frame/Location.idl
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| index c8ea4f0675f281c1e1f4c1d5892c17ae154f2ab7..da81ecff9f585b6d5781ef7040e8320a339d950d 100644
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| --- a/Source/core/frame/Location.idl
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| +++ b/Source/core/frame/Location.idl
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| @@ -29,6 +29,11 @@
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|  [
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|      CheckSecurity=Frame,
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|  ] interface Location {
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| +    // |assign|, |replace|, and *writing* |href| do not require a security
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| +    // check, as they *change* the page, and thus these do not change any
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| +    // property of an *existing* document at a different origin.
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| +    // However, *reading* |href|, or accessing any component, is a security
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| +    // problem, since that allows tracking navigation.
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|      [SetterCallWith=ActiveWindow&FirstWindow, DoNotCheckSecurity=Setter, Unforgeable] attribute DOMString href;
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|  
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|      [CallWith=ActiveWindow&FirstWindow, DoNotCheckSecurity, Unforgeable, ReadOnly, PerWorldBindings, ActivityLogging=ForIsolatedWorlds] void assign([Default=Undefined] optional DOMString url);
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| 
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