Small fix for the timer event plotter.

tools/profviz/composer.js

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 313 matching lines @@
                             processor: processCodeDeoptEvent },
         'current-time':   { parsers: [parseTimeStamp],
                             processor: processCurrentTimeEvent },
         'tick':           { parsers: [parseInt, parseTimeStamp,
                                       null, null, parseInt, 'var-args'],
                             processor: processTickEvent }
       });
 
     var line;
     while (line = input()) {
-      logreader.processLogLine(line);
+      for (var s of line.split("\n")) logreader.processLogLine(s);
     }
 
     // Collect execution pauses.
     for (name in TimerEvents) {
       var event = TimerEvents[name];
       if (!event.pause) continue;
       var ranges = event.ranges;
       for (var j = 0; j < ranges.length; j++) execution_pauses.push(ranges[j]);
     }
     execution_pauses = MergeRanges(execution_pauses);
@@ skipping 197 matching lines @@
     output("plot '-' using 1:2 axes x1y2 with impulses ls 1");
     for (var i = 0; i < execution_pauses.length; i++) {
       var pause = execution_pauses[i];
       output(pause.end + " " + pause.duration());
       obj_index++;
     }
     output("e");
     return obj_index;
   };
 }