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diff --git a/chromium/third_party/blink/renderer/platform/peerconnection/rtc_peer_connection_handler_client.h b/chromium/third_party/blink/renderer/platform/peerconnection/rtc_peer_connection_handler_client.h
new file mode 100644
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+++ b/chromium/third_party/blink/renderer/platform/peerconnection/rtc_peer_connection_handler_client.h
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2012 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_PEERCONNECTION_RTC_PEER_CONNECTION_HANDLER_CLIENT_H_
+#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_PEERCONNECTION_RTC_PEER_CONNECTION_HANDLER_CLIENT_H_
+
+#include <memory>
+
+#include "base/memory/scoped_refptr.h"
+#include "third_party/blink/renderer/platform/platform_export.h"
+#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
+#include "third_party/blink/renderer/platform/wtf/vector.h"
+#include "third_party/webrtc/api/peer_connection_interface.h"
+#include "third_party/webrtc/api/sctp_transport_interface.h"
+
+namespace blink {
+
+class RTCIceCandidatePlatform;
+class RTCRtpTransceiverPlatform;
+class RTCRtpReceiverPlatform;
+
+struct PLATFORM_EXPORT WebRTCSctpTransportSnapshot {
+  rtc::scoped_refptr<webrtc::SctpTransportInterface> transport;
+  webrtc::SctpTransportInformation sctp_transport_state =
+      webrtc::SctpTransportInformation(webrtc::SctpTransportState::kNew);
+  webrtc::DtlsTransportInformation dtls_transport_state =
+      webrtc::DtlsTransportInformation(webrtc::DtlsTransportState::kNew);
+};
+
+class PLATFORM_EXPORT RTCPeerConnectionHandlerClient {
+ public:
+  virtual ~RTCPeerConnectionHandlerClient();
+
+  virtual void NegotiationNeeded() = 0;
+  virtual void DidGenerateICECandidate(RTCIceCandidatePlatform*) = 0;
+  virtual void DidFailICECandidate(const String& address,
+                                   base::Optional<uint16_t> port,
+                                   const String& host_candidate,
+                                   const String& url,
+                                   int error_code,
+                                   const String& error_text) = 0;
+  virtual void DidChangeSignalingState(
+      webrtc::PeerConnectionInterface::SignalingState) = 0;
+  virtual void DidChangeIceGatheringState(
+      webrtc::PeerConnectionInterface::IceGatheringState) = 0;
+  virtual void DidChangeIceConnectionState(
+      webrtc::PeerConnectionInterface::IceConnectionState) = 0;
+  virtual void DidChangePeerConnectionState(
+      webrtc::PeerConnectionInterface::PeerConnectionState) {}
+  virtual void DidAddReceiverPlanB(std::unique_ptr<RTCRtpReceiverPlatform>) = 0;
+  virtual void DidRemoveReceiverPlanB(
+      std::unique_ptr<RTCRtpReceiverPlatform>) = 0;
+  virtual void DidModifyTransceivers(
+      Vector<std::unique_ptr<RTCRtpTransceiverPlatform>>,
+      Vector<uintptr_t>,
+      bool is_remote_description) = 0;
+  virtual void DidModifySctpTransport(WebRTCSctpTransportSnapshot) = 0;
+  virtual void DidAddRemoteDataChannel(
+      scoped_refptr<webrtc::DataChannelInterface>) = 0;
+  virtual void DidNoteInterestingUsage(int usage_pattern) = 0;
+  virtual void UnregisterPeerConnectionHandler() = 0;
+  virtual void ClosePeerConnection();
+};
+
+}  // namespace blink
+
+#endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_PEERCONNECTION_RTC_PEER_CONNECTION_HANDLER_CLIENT_H_