Do not merge adjourning ranges when calculating percentages in plot.

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 395 matching lines @@
 
     function DrawHalfBar(row, color, start, end, width) {
       DrawBarBase(color, start, end, row, row - width);
     }
 
     var percentages = {};
     var total = 0;
     for (var name in TimerEvents) {
       var event = TimerEvents[name];
       var ranges = RestrictRangesTo(event.ranges, range_start, range_end);
-      ranges = MergeRanges(ranges);
       var sum =
         ranges.map(function(range) { return range.duration(); })
             .reduce(function(a, b) { return a + b; }, 0);
       percentages[name] = (sum / (range_end - range_start) * 100).toFixed(1);
     }
 
     // Plot deopts.
     deopts.sort(function(a, b) { return b.size - a.size; });
     var max_deopt_size = deopts.length > 0 ? deopts[0].size : Infinity;
 
@@ skipping 98 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;
   };
 }