IEFixes: Clean up duplicate variables

Declare the global ones as global, and assign them as implicit
globals instead of having both a local variable *and* a window
property. hasClass and expandedURLs are local variable only.

Follows-up 28cca60, fcf4934, 09d9dfd.

Change-Id: I81436c218eedf7c1930703c181a58adb2e5f44b0
Merge "IEFixes: Clean up duplicate variables"