Include statistical profile into profviz.

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 404 matching lines @@
   };
 
 
   this.assembleOutput = function(output) {
     output("set yrange [0:" + (num_timer_event + 1) + "]");
     output("set xlabel \"execution time in ms\"");
     output("set xrange [" + range_start + ":" + range_end + "]");
     output("set style fill pattern 2 bo 1");
     output("set style rect fs solid 1 noborder");
     output("set style line 1 lt 1 lw 1 lc rgb \"#000000\"");
+    output("set border 15 lw 0.2");  // Draw thin border box.
     output("set xtics out nomirror");
     output("unset key");
 
     function DrawBar(row, color, start, end, width) {
       obj_index++;
       command = "set object " + obj_index + " rect";
       command += " from " + start + ", " + (row - width);
       command += " to " + end + ", " + (row + width);
       command += " fc rgb \"" + color + "\"";
       output(command);
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     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;
   };
 }