Allow for lists of lists when summarizing performance results

Using page-repeat and pageset-repeat options in commands like
tools/perf/run_measurement --browser=release --page-repeat=2 --pageset-repeat=3 blink_perf third_party/WebKit/PerformanceTests/Parser/html-parser.html
previously let to a crash in _MeanAndStdDevFromList.

BUG=

Review URL: https://chromiumcodereview.appspot.com/17390017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@207426 0039d316-1c4b-4281-b951-d872f2087c98


CrOS-Libchrome-Original-Commit: 182729401d7544e360ecad4b2b50deb49e0d211e
1 file changed
tree: 85c0ffb0f7d855f0238b4a8d05e29028cdbaf563
  1. base/
  2. build/
  3. dbus/
  4. ipc/
  5. testing/
  6. third_party/