message: Remove backwards compatibility names from api/uma_metrics.h.
  Cr-Commit-Position: refs/heads/master@{#29007}
diff: @@ -37,12 +37,6 @@ enum PeerConnectionAddressFamilyCounter {
  kPeerConnectionAddressFamilyCounter_Max,
  };
  -// TODO(guoweis): Keep previous name here until all references are renamed.
  -#define kBoundary kPeerConnectionAddressFamilyCounter_Max
  -
  -// TODO(guoweis): Keep previous name here until all references are renamed.
  -typedef PeerConnectionAddressFamilyCounter PeerConnectionUMAMetricsCounter;
  -
  // This enum defines types for UMA samples, which will have a range.
  enum PeerConnectionMetricsName {
  kNetworkInterfaces_IPv4, // Number of IPv4 interfaces.
  @@ -53,9 +47,6 @@ enum PeerConnectionMetricsName {
  kPeerConnectionMetricsName_Max
  };
  -// TODO(guoweis): Keep previous name here until all references are renamed.
  -typedef PeerConnectionMetricsName PeerConnectionUMAMetricsName;
  -
  // The IceCandidatePairType has the format of
  // <local_candidate_type>_<remote_candidate_type>. It is recorded based on the
  // type of candidate pair used when the PeerConnection first goes to a completed
  