BUG ID: 4361048 Glendale Regression: Seed: scrolling with scrollwheel, trackpad doesn't work for nested framesets at gmail.com

STEPS TO TEST:

1. Place your mouse cursor over the leftmost frame below.
2. Try to scroll the contents of the frame up and down my using your mouse's scrollwheel.
3. Repeat for the other two frames.

TEST PASS: The contents of the frame each frame should scroll.

TEST FAIL: The contents of each frame do NOT scroll.