Add Web Page Replay test to page cycler.
  - Add supporting WPR extension.

BUG=
TEST=


Review URL: http://codereview.chromium.org/9956045

Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: e8e3eea260001a067f069d8da98584c2f6fc44fa
1 file changed
tree: f22c69aa3c254be9a1a13d29b469190ee2b26660
  1. google/