Roll libsrtp r214783:250757

Just picks up one commit:

r250757 torne Fix license description in README.chromium.

BUG=

Review URL: https://codereview.chromium.org/152583009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250860 0039d316-1c4b-4281-b951-d872f2087c98
Collect touch scroll latency for JS driven scroll

tough_scheduling_cases have several cases touch_handler_scrolling.html?*
that use touch move handler to scroll the page. This CL adds the touch
scroll latency collection for those cases.

BUG=246034
TEST=smoothness test on touch_scheduling_cases.touch_handler_scrolling.html?*
     now show mean_touch_scroll_latency.

Review URL: https://codereview.chromium.org/160683003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250861 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250862 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 250862