Adding ios version of AmountOfAvailablePhysicalMemory

Function is duplicate of Mac OSX version

BUG=338760

Review URL: https://codereview.chromium.org/183063004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255002 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 255002
[AudioPlayer] Add test for opening another file from Files.app

BUG=none
TEST=manually

Review URL: https://codereview.chromium.org/177443006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255003 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 255003
Update WV browser tests to use portable test license server (reland r254258).

The DEPS roll for test license server has been fixed.

This CL updates WV encrypted media browser tests to:
- use test license server in third_party/widevine/test.
- dynamically select an open port to start the test server on.

It also adds a new gyp target for test_license_server.

BUG=339983

Review URL: https://codereview.chromium.org/186243003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255004 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 255004