Add BWE plot to event log analyzer.

webrtc/tools/event_log_visualizer/plot_python.cc

 /*
  *  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.
  */
 
@@ skipping 40 matching lines @@
         // There is a plt.bar function that draws bar plots,
         // but it is *way* too slow to be useful.
         printf(
             "plt.vlines(x%zu, map(lambda t: min(t,0), y%zu), map(lambda t: "
             "max(t,0), y%zu), color=rgb_colors[%zu], "
             "label=\'%s\')\n",
             i, i, i, i, series[i].label.c_str());
       } else if (series[i].style == LINE_GRAPH) {
         printf("plt.plot(x%zu, y%zu, color=rgb_colors[%zu], label=\'%s\')\n", i,
                i, i, series[i].label.c_str());
+      } else if (series[i].style == LINE_DOT_GRAPH) {
+        printf(
+            "plt.plot(x%zu, y%zu, color=rgb_colors[%zu], label=\'%s\', "
+            "marker='.')\n",
+            i, i, i, series[i].label.c_str());
       } else {
         printf("raise Exception(\"Unknown graph type\")\n");
       }
     }
   }
 
   printf("plt.xlim(%f, %f)\n", xaxis_min, xaxis_max);
   printf("plt.ylim(%f, %f)\n", yaxis_min, yaxis_max);
   printf("plt.xlabel(\'%s\')\n", xaxis_label.c_str());
   printf("plt.ylabel(\'%s\')\n", yaxis_label.c_str());
@@ skipping 18 matching lines @@
 }
 
 Plot* PythonPlotCollection::append_new_plot() {
   Plot* plot = new PythonPlot();
   plots.push_back(std::unique_ptr<Plot>(plot));
   return plot;
 }
 
 }  // namespace plotting
 }  // namespace webrtc