Switch the prerendering pending swap code to use render frame IDs instead of render views.

BUG=304341
R=tburkard@chromium.org

Review URL: https://codereview.chromium.org/138613004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244841 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 244841