Create histogram of download bandwidths.
Create histogram of download bandwidths.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/516025

git-svn-id: http://src.chromium.org/svn/trunk/src@35270 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 206b8815a8f7f98b03eb7da9903d3cec4d46227e
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser