git rebase with zoom percentage cl
git rebase with zoom percentage cl

had to do a git rebase before uploading previous cl,
while doing so made changes to the bitmapper-sliders.html
and pushed these changes accidentally.
Code should be what was lgtm'd with the previous cl.

R=tapted@chromium.org

Review URL: https://codereview.appspot.com/192130043

jackhou-chromium/bitmapper,jackhou-chromium/bitmapper,jackhou-chromium/bitmapper