Enumerate layered service providers and namespace providers under Windows and display them on a new net-internals tab.  On other OSes, the new tab is always hidden.

BUG=53474
TEST=manual

Review URL: http://codereview.chromium.org/3329016

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@59364 0039d316-1c4b-4281-b951-d872f2087c98
8 files changed