Add base:: to some string16s in skia/.

R=vandebo@chromium.org
BUG=329295

Review URL: https://codereview.chromium.org/108883003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@241826 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 241826
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
SVN changes up to revision 241827