| // Copyright 2017 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 UI_LATENCY_LATENCY_TRACKER_H_ |
| #define UI_LATENCY_LATENCY_TRACKER_H_ |
| |
| #include "base/macros.h" |
| #include "ui/latency/latency_info.h" |
| |
| namespace ui { |
| |
| // Utility class for tracking the latency of events. Relies on LatencyInfo |
| // components logged by content::RenderWidgetHostLatencyTracker. |
| class LatencyTracker { |
| public: |
| LatencyTracker() = default; |
| ~LatencyTracker() = default; |
| |
| // Terminates latency tracking for events that triggered rendering, also |
| // performing relevant UMA latency reporting. |
| // Called when GPU buffers swap completes. |
| void OnGpuSwapBuffersCompleted(const LatencyInfo& latency); |
| |
| protected: |
| virtual void ReportRapporScrollLatency( |
| const std::string& name, |
| const LatencyInfo::LatencyComponent& start_component, |
| const LatencyInfo::LatencyComponent& end_component); |
| |
| private: |
| void ComputeEndToEndLatencyHistograms( |
| const LatencyInfo::LatencyComponent& gpu_swap_begin_component, |
| const LatencyInfo::LatencyComponent& gpu_swap_end_component, |
| const LatencyInfo& latency); |
| |
| DISALLOW_COPY_AND_ASSIGN(LatencyTracker); |
| }; |
| |
| } // namespace latency |
| |
| #endif // UI_LATENCY_LATENCY_TRACKER_H_ |