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diff --git a/third_party/libwebrtc/test/pc/e2e/analyzer/video/dvqa/pausable_state.h b/third_party/libwebrtc/test/pc/e2e/analyzer/video/dvqa/pausable_state.h
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+++ b/third_party/libwebrtc/test/pc/e2e/analyzer/video/dvqa/pausable_state.h
@@ -0,0 +1,89 @@
+/*
+ *  Copyright (c) 2023 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 TEST_PC_E2E_ANALYZER_VIDEO_DVQA_PAUSABLE_STATE_H_
+#define TEST_PC_E2E_ANALYZER_VIDEO_DVQA_PAUSABLE_STATE_H_
+
+#include <cstdint>
+#include <vector>
+
+#include "api/units/time_delta.h"
+#include "api/units/timestamp.h"
+#include "system_wrappers/include/clock.h"
+
+namespace webrtc {
+
+// Provides ability to pause and resume and tell at any point was state paused
+// or active.
+class PausableState {
+ public:
+  // Creates a state as active.
+  explicit PausableState(Clock* clock) : clock_(clock) {}
+  PausableState(const PausableState&) = delete;
+  PausableState& operator=(const PausableState&) = delete;
+  PausableState(PausableState&&) = default;
+  PausableState& operator=(PausableState&&) = default;
+
+  // Pauses current state. States MUST be active.
+  //
+  // Complexity: O(1)
+  void Pause();
+
+  // Activates current state. State MUST be paused.
+  //
+  // Complexity: O(1)
+  void Resume();
+
+  // Returns is state is paused right now.
+  //
+  // Complexity: O(1)
+  bool IsPaused() const;
+
+  // Returns if last event before `time` was "pause".
+  //
+  // Complexity: O(log(n))
+  bool WasPausedAt(Timestamp time) const;
+
+  // Returns if next event after `time` was "resume".
+  //
+  // Complexity: O(log(n))
+  bool WasResumedAfter(Timestamp time) const;
+
+  // Returns time of last event or plus infinity if no events happened.
+  //
+  // Complexity O(1)
+  Timestamp GetLastEventTime() const;
+
+  // Returns sum of durations during which state was active starting from
+  // time `time`.
+  //
+  // Complexity O(n)
+  TimeDelta GetActiveDurationFrom(Timestamp time) const;
+
+ private:
+  struct Event {
+    Timestamp time;
+    bool is_paused;
+  };
+
+  // Returns position in `events_` which has time:
+  // 1. Most right of the equals
+  // 2. The biggest which is smaller
+  // 3. -1 otherwise (first time is bigger than `time`)
+  int64_t GetPos(Timestamp time) const;
+
+  Clock* clock_;
+
+  std::vector<Event> events_;
+};
+
+}  // namespace webrtc
+
+#endif  // TEST_PC_E2E_ANALYZER_VIDEO_DVQA_PAUSABLE_STATE_H_