Add two new modes for dumping stats output:  raw mode and json mode.
Add two new modes for dumping stats output:  raw mode and json mode.

These are handy when looking at renderer stats counters because the
stats.html page does so much DOM work that it can influence the stats.
These output formats are trivial and allow for better cross-tab monitoring
witout impacting the results.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/6489004

git-svn-id: http://src.chromium.org/svn/trunk/src@74497 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: ba7509874fcb8d1704bfd468a01d1df66695c547
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