No scroll lock for zoom to page width

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Zoom to page width
2. 2 finger scroll
3.

What is the expected output? What do you see instead?
Would be nice if scroll does not move page side to side as it currently does. 
When zoomed to page width, lock side to side movement and just allow up and 
down scrolling.

What version of the product are you using? On what operating system?
8.1 and 8.2

Please provide any additional information below.

Original issue reported on code.google.com by george.a...@gmail.com on 13 Jan 2012 at 4:45