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This CL brings the PPB_Var new shared implementation (from r113491) in to compliance with the new naming convention introduced at r113428. I didn't want to do add any more complexity to that in-flight CL, so I'm doing the rename here.

BUG=None
TEST=N/A


Review URL: http://codereview.chromium.org/8870002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@113563 0039d316-1c4b-4281-b951-d872f2087c98