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diff --git a/third_party/libwebrtc/call/adaptation/resource_adaptation_processor_interface.h b/third_party/libwebrtc/call/adaptation/resource_adaptation_processor_interface.h
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+/*
+ *  Copyright 2020 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef CALL_ADAPTATION_RESOURCE_ADAPTATION_PROCESSOR_INTERFACE_H_
+#define CALL_ADAPTATION_RESOURCE_ADAPTATION_PROCESSOR_INTERFACE_H_
+
+#include <map>
+#include <vector>
+
+#include "absl/types/optional.h"
+#include "api/adaptation/resource.h"
+#include "api/rtp_parameters.h"
+#include "api/scoped_refptr.h"
+#include "api/task_queue/task_queue_base.h"
+#include "api/video/video_adaptation_counters.h"
+#include "api/video/video_frame.h"
+#include "call/adaptation/adaptation_constraint.h"
+#include "call/adaptation/encoder_settings.h"
+#include "call/adaptation/video_source_restrictions.h"
+
+namespace webrtc {
+
+class ResourceLimitationsListener {
+ public:
+  virtual ~ResourceLimitationsListener();
+
+  // The limitations on a resource were changed. This does not mean the current
+  // video restrictions have changed.
+  virtual void OnResourceLimitationChanged(
+      rtc::scoped_refptr<Resource> resource,
+      const std::map<rtc::scoped_refptr<Resource>, VideoAdaptationCounters>&
+          resource_limitations) = 0;
+};
+
+// The Resource Adaptation Processor is responsible for reacting to resource
+// usage measurements (e.g. overusing or underusing CPU). When a resource is
+// overused the Processor is responsible for performing mitigations in order to
+// consume less resources.
+class ResourceAdaptationProcessorInterface {
+ public:
+  virtual ~ResourceAdaptationProcessorInterface();
+
+  virtual void AddResourceLimitationsListener(
+      ResourceLimitationsListener* limitations_listener) = 0;
+  virtual void RemoveResourceLimitationsListener(
+      ResourceLimitationsListener* limitations_listener) = 0;
+  // Starts or stops listening to resources, effectively enabling or disabling
+  // processing. May be called from anywhere.
+  // TODO(https://crbug.com/webrtc/11172): Automatically register and unregister
+  // with AddResource() and RemoveResource() instead. When the processor is
+  // multi-stream aware, stream-specific resouces will get added and removed
+  // over time.
+  virtual void AddResource(rtc::scoped_refptr<Resource> resource) = 0;
+  virtual std::vector<rtc::scoped_refptr<Resource>> GetResources() const = 0;
+  virtual void RemoveResource(rtc::scoped_refptr<Resource> resource) = 0;
+};
+
+}  // namespace webrtc
+
+#endif  // CALL_ADAPTATION_RESOURCE_ADAPTATION_PROCESSOR_INTERFACE_H_