[rAC] Remove some stale TODOs

BUG=none
TEST=none
R=estade@chromium.org

Review URL: https://codereview.chromium.org/29073006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@229559 0039d316-1c4b-4281-b951-d872f2087c98
yukishiino watches commits related to text input.

TEST=none

Review URL: https://codereview.chromium.org/29083002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@229560 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 229559
Add a new histogram to track the number of QUIC streams opened
when a new QUIC stream is created.

Net.QuicSession.NumOpenStreams

R=jar@chromium.org

Review URL: https://codereview.chromium.org/29143003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@229561 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 229561