| Index: base/callback.h
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| diff --git a/base/callback.h b/base/callback.h
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| index 923ce99183f22974983906c88175f7c6b39c2068..594c9d6244b6b0b45b7e6903d0a3259f77665ce2 100644
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| --- a/base/callback.h
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| +++ b/base/callback.h
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| @@ -269,8 +269,8 @@
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|  //
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|  // By default Bind() will store copies of all bound parameters, and attempt
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|  // to refcount a target object if the function being bound is a class method.
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| -// These copies are created even if the function takes parameters as const or
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| -// non-const references.
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| +// These copies are created even if the function takes parameters as const
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| +// references. (Binding to non-const references is forbidden, see bind.h)
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|  //
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|  // To change this behavior, we introduce a set of argument wrappers
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|  // (e.g., Unretained(), and ConstRef()).  These are simple container templates
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| 
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