1 files changed, 55 insertions, 0 deletions
diff --git a/chromium/third_party/blink/renderer/core/inspector/inspector_performance_timeline_agent.h b/chromium/third_party/blink/renderer/core/inspector/inspector_performance_timeline_agent.h
new file mode 100644
index 00000000000..94c106d2b30
--- /dev/null
+++ b/chromium/third_party/blink/renderer/core/inspector/inspector_performance_timeline_agent.h
@@ -0,0 +1,55 @@
+// Copyright 2021 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 THIRD_PARTY_BLINK_RENDERER_CORE_INSPECTOR_INSPECTOR_PERFORMANCE_TIMELINE_AGENT_H_
+#define THIRD_PARTY_BLINK_RENDERER_CORE_INSPECTOR_INSPECTOR_PERFORMANCE_TIMELINE_AGENT_H_
+
+#include <memory>
+
+#include "base/macros.h"
+#include "base/task/sequence_manager/task_time_observer.h"
+#include "third_party/blink/renderer/core/core_export.h"
+#include "third_party/blink/renderer/core/inspector/inspector_base_agent.h"
+#include "third_party/blink/renderer/core/inspector/inspector_session_state.h"
+#include "third_party/blink/renderer/core/inspector/protocol/PerformanceTimeline.h"
+
+namespace blink {
+
+class ExecutionContext;
+class InspectedFrames;
+class PerformanceEntry;
+
+class CORE_EXPORT InspectorPerformanceTimelineAgent final
+    : public InspectorBaseAgent<protocol::PerformanceTimeline::Metainfo> {
+ public:
+  explicit InspectorPerformanceTimelineAgent(InspectedFrames*);
+  ~InspectorPerformanceTimelineAgent() override;
+
+  // PerformanceTimeline probes implementation.
+  void PerformanceEntryAdded(ExecutionContext*, PerformanceEntry*);
+
+  void Trace(Visitor*) const override;
+
+ private:
+  // Performance protocol domain implementation.
+  protocol::Response enable(
+      std::unique_ptr<protocol::Array<String>> event_types) override;
+  protocol::Response disable() override;
+  void Restore() override;
+
+  void InnerEnable();
+  bool IsEnabled() const;
+
+  using EventsVector =
+      protocol::Array<protocol::PerformanceTimeline::TimelineEvent>;
+  void CollectEntries(AtomicString type, EventsVector* events);
+
+  Member<InspectedFrames> inspected_frames_;
+  InspectorAgentState::Integer enabled_types_;
+  DISALLOW_COPY_AND_ASSIGN(InspectorPerformanceTimelineAgent);
+};
+
+}  // namespace blink
+
+#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_INSPECTOR_INSPECTOR_PERFORMANCE_TIMELINE_AGENT_H_