Roll Clang 192869:193323

BUG=313468, 313823

Review URL: https://codereview.chromium.org/49983003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233418 0039d316-1c4b-4281-b951-d872f2087c98
Launch ephemeral app for webstore detail links

Added EphemeralAppThrottle, which will launch ephemeral apps for
links to Chrome Web Store detail pages instead of opening the page in
the browser. This will only occur if the enable-ephemeral-apps switch
is enabled.

For experimental purposes only. The extension will currently be
installed in Chrome.

BUG=312460

Review URL: https://codereview.chromium.org/51943003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233419 0039d316-1c4b-4281-b951-d872f2087c98
Update media tests to unprefixed MSE API.

BUG=307107

Review URL: https://codereview.chromium.org/54053007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233420 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 233420