Fix a xml parser crash in the valgrind analyze script.
Fix a xml parser crash in the valgrind analyze script.

I.e. http://build.chromium.org/buildbot/waterfall/builders/Modules%20Mac%20(valgrind)/builds/477/steps/valgrind%20test%3A%20ui/logs/stdio
Review URL: http://codereview.chromium.org/115093

git-svn-id: http://src.chromium.org/svn/trunk/src@15563 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: ad9edf4555e9e6262c57272ef626e5091491f6a3
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