Close duplicated handle on windows.

When setting up the ThreadIdNameManager we need to make a duplicate of the
thread handle on Windows. That handle is currently be leaked as pointed out by
Dr.Memory. This CL closes the handle after the ThreadIdNameManager has removed
the relevant entry.

BUG=315203

Review URL: https://codereview.chromium.org/75133004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243330 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243330