Revert 249168 "Update WebFrameClient implementations to maintain..."

> Update WebFrameClient implementations to maintain frame tree.
> 
> BUG=340002
> R=boliu@chromium.org, creis@chromium.org, nasko@chromium.org, thestig@chromium.org
> 
> Review URL: https://codereview.chromium.org/148353003

TBR=dcheng@chromium.org

Review URL: https://codereview.chromium.org/139643009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249174 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249174