Define a protobuf format for representing plots

webrtc/tools/event_log_visualizer/plot_protobuf.h

 /*
  *  Copyright (c) 2016 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 WEBRTC_TOOLS_EVENT_LOG_VISUALIZER_PLOT_PYTHON_H_
-#define WEBRTC_TOOLS_EVENT_LOG_VISUALIZER_PLOT_PYTHON_H_
+#ifndef WEBRTC_TOOLS_EVENT_LOG_VISUALIZER_PLOT_PROTOBUF_H_
+#define WEBRTC_TOOLS_EVENT_LOG_VISUALIZER_PLOT_PROTOBUF_H_
 
+#include "webrtc/tools/event_log_visualizer/graph.pb.h"
 #include "webrtc/tools/event_log_visualizer/plot_base.h"
 
 namespace webrtc {
 namespace plotting {
 
-class PythonPlot final : public Plot {
+class ProtobufPlot final : public Plot {
  public:
-  PythonPlot();
-  ~PythonPlot() override;
+  ProtobufPlot();
+  ~ProtobufPlot() override;
   void Draw() override;
+  void ExportProtobuf(protobuf_plot::Plot* plot);
 };
 
-class PythonPlotCollection final : public PlotCollection {
+class ProtobufPlotCollection final : public PlotCollection {
  public:
-  PythonPlotCollection();
-  ~PythonPlotCollection() override;
+  ProtobufPlotCollection();
+  ~ProtobufPlotCollection() override;
   void Draw() override;
   Plot* AppendNewPlot() override;
+  void ExportProtobuf(protobuf_plot::PlotCollection* collection);
 };
 
 }  // namespace plotting
 }  // namespace webrtc
 
-#endif  // WEBRTC_TOOLS_EVENT_LOG_VISUALIZER_PLOT_PYTHON_H_
+#endif  // WEBRTC_TOOLS_EVENT_LOG_VISUALIZER_PLOT_PROTOBUF_H_