repoview: invalidate 'visible' filtered revisions when bookmarks change

Context: the result of computehidden, used to compute the 'visible' revisions
is cached. Its output can change when:
1) new obsolete commits are created
2) new bookmarks are created or deleted
3) new tags are created or deleted
4) the parents of the working copy change

We currently correctly invalidate the cache only in the case 1).
This patch fixes the second case (bookmarks) by invalidating the cache once
a bookmark is added or removed.

mercurial/bookmarks.py

@@ -80,6 +80,7 b' class bmstore(dict):'
         '''
         repo = self._repo
         self._writerepo(repo)
+        repo.invalidatevolatilesets()
 
     def _writerepo(self, repo):
         """Factored out for extensibility"""

tests/test-obsolete.t

@@ -927,3 +927,42 b' Test heads computation on pending index '
   $ echo aa > a
   $ hg amendtransient
   [1, 3]
+
+Test cache consistency for the visible filter
+1) We want to make sure that the cached filtered revs are invalidated when
+bookmarks change
+  $ cd ..
+  $ cat >$TESTTMP/test_extension.py  << EOF
+  > from mercurial import cmdutil, extensions, bookmarks, repoview
+  > def _bookmarkchanged(orig, bkmstoreinst, *args, **kwargs):
+  >  repo = bkmstoreinst._repo
+  >  ret = orig(bkmstoreinst, *args, **kwargs)
+  >  hidden1 = repoview.computehidden(repo)
+  >  hidden = repoview.filterrevs(repo, 'visible')
+  >  if sorted(hidden1) != sorted(hidden):
+  >    print "cache inconsistency"
+  >  return ret
+  > def extsetup(ui):
+  >   extensions.wrapfunction(bookmarks.bmstore, 'write', _bookmarkchanged)
+  > EOF
+
+  $ hg init repo-cache-inconsistency
+  $ cd repo-issue-nativerevs-pending-changes
+  $ mkcommit a
+  a already tracked!
+  $ mkcommit b
+  $ hg id
+  13bedc178fce tip
+  $ echo "hello" > b
+  $ hg commit --amend -m "message"
+  $ hg book bookb -r 13bedc178fce --hidden
+  $ hg log -r 13bedc178fce
+  5:13bedc178fce (draft) [ bookb] add b
+  $ hg book -d bookb
+  $ hg log -r 13bedc178fce
+  abort: hidden revision '13bedc178fce'!
+  (use --hidden to access hidden revisions)
+  [255]
+
+
+