Ignore RWHVA return key releases without presses.

The omnibox focuses web content on return key presses.
The key release events shouldn't be forwarded to web content.
Bail on VKEY_RETURN & ET_KEY_RELEASED with no ET_KEY_PRESSED.
This matches RenderWidgetHostViewWin::OnKeyEvent behavior.

BUG=322965
TEST=Return keyup events shouldn't be handled by web content after pressing enter in the omnibox.
R=ben@chromium.org

Review URL: https://codereview.chromium.org/125323002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243258 0039d316-1c4b-4281-b951-d872f2087c98
Log the QUIC priority when sending requests.

Review URL: https://codereview.chromium.org/125333002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243259 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243259