Remove indirect recursion when receiving packets.

Call to ReceiveOnePacket in OnReceived replaced with call to PostTask.

BUG=342578

Review URL: https://codereview.chromium.org/178123002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253173 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 253173