GitLab

This CL:
- removes a hack that handles move-only elements before C++11 support.
  With this change the underlying storage of mojo::Map<K,V> is always
  std::map<K,V>.
- adds "Map(std::map<K,V>&&)".
- adds "const std::map<K,V>& storage() const".
- adds "std::map<K,V> PassStorage()".
- removes the home-made ConstMapIterator; uses std::map<K,V>::const_iterator
  instead.

BUG=583738

Review URL: https://codereview.chromium.org/1683863002

Cr-Commit-Position: refs/heads/master@{#374559}