Removes unnecessary uses of slice(arguments, 0) http://codereview.appspot.com/6203062
Removes unnecessary uses of slice(arguments, 0)
http://codereview.appspot.com/6203062

Removes some unnecessary uses of slice(arguments, 0) and adds notes
when it's actually necessary.  This is usually when the fake arguments
object is given directly to the apply method, where only arrays and
real arguments objects are allowed.

R=erights@google.com, felix8a


git-svn-id: eb21526166532bd3afc2c1499c0cf105ce815f5a@4875 360991c0-9f3b-0410-ba87-8b362a00edf4

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