Introduces ability for session to wait on a migration trigger for a new

net/quic/chromium/quic_stream_factory.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_QUIC_QUIC_STREAM_FACTORY_H_
 #define NET_QUIC_QUIC_STREAM_FACTORY_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 62 matching lines @@
   WRITE_ERROR       // Migration due to socket write error.
 };
 
 // Result of a session migration attempt.
 enum class MigrationResult {
   SUCCESS,         // Migration succeeded.
   NO_NEW_NETWORK,  // Migration failed since no new network was found.
   FAILURE          // Migration failed for other reasons.
 };
 
+enum QuicConnectionMigrationStatus {
+  MIGRATION_STATUS_NO_MIGRATABLE_STREAMS,
+  MIGRATION_STATUS_ALREADY_MIGRATED,
+  MIGRATION_STATUS_INTERNAL_ERROR,
+  MIGRATION_STATUS_TOO_MANY_CHANGES,
+  MIGRATION_STATUS_SUCCESS,
+  MIGRATION_STATUS_NON_MIGRATABLE_STREAM,
+  MIGRATION_STATUS_DISABLED,
+  MIGRATION_STATUS_NO_ALTERNATE_NETWORK,
+  MIGRATION_STATUS_MAX
+};
+
 // Encapsulates a pending request for a QuicHttpStream.
 // If the request is still pending when it is destroyed, it will
 // cancel the request with the factory.
 class NET_EXPORT_PRIVATE QuicStreamRequest {
  public:
   explicit QuicStreamRequest(QuicStreamFactory* factory);
   ~QuicStreamRequest();
 
   // |cert_verify_flags| is bitwise OR'd of CertVerifier::VerifyFlags and it is
   // passed to CertVerifier::Verify.
@@ skipping 579 matching lines @@
   const scoped_refptr<SSLConfigService> ssl_config_service_;
 
   base::WeakPtrFactory<QuicStreamFactory> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicStreamFactory);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_STREAM_FACTORY_H_