Uprev to Polymer 0.1.4

BUG=347642

Review URL: https://codereview.chromium.org/185643008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256894 0039d316-1c4b-4281-b951-d872f2087c98
Pepper: Remove stale comments in trusted plugin.

This removes an unnecessary include of ppp_instance.h as well.

BUG=

Review URL: https://codereview.chromium.org/197983002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256895 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 256894
Enable the ProofVerifierChromium to handle multiple simultaneous requests.

Review URL: https://codereview.chromium.org/196953006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256896 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 256896