Remove unused enum WebKit::WebEditingAction

This patch removes unused enum WebKit::WebEditingAction for removing unused header files in Blink.

BUG=302013
TEST=n/a; no behavior changes
R=jochen@chromium.org

Review URL: https://codereview.chromium.org/26565010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227883 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227883
Fix webkitprerenderstop events being lost.

We often convert prerenders into MatchComplete replacements and delay the
stop events. Forward notifications about replacements all the way to the link
manager to emit the event at the right time.

Modify the browser tests to assert events get fired as appropriate for each event.

BUG=297708
TEST=PrerenderBrowserTest.*

Review URL: https://codereview.chromium.org/25039010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227884 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227884