Bind to all interfaces for chrome.dial.
Allow port to be re-used.
Use Chrome/Version in user-agent for M-SEARCH requests.

BUG=264150, 300113
TBR=mpcomplete

Review URL: https://codereview.chromium.org/25353004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227854 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227854