Add chart names to Y values as well in Endure results.
In my recent change to the Endure measurement (https://codereview.chromium.org/
59023004/), I forgot to add the chart name when adding Y value results (Example stdio: http://build.chromium.org/p/chromium.endure/builders/Linux%20QA%20Perf%20%28dbg%29%283%29/builds/9965/steps/endure_gmail_labels_wpr/logs/stdio)
This should hopefully fix that.
BUG=
Review URL: https://codereview.chromium.org/
118473002
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@241827 0039d316-1c4b-4281-b951-d872f2087c98