Maintain QuicStopWaitingFrame on stack properly

Otherwise, the pointer that's stored in frames points to something that
goes out of scope. This causes a crash on VS2013 in Release.

R=rtenneti@chromium.org, rch@chromium.org
BUG=347459

Review URL: https://codereview.chromium.org/183363003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253882 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 253882