[turbolizer] Improved display of perf profiling information.

tools/turbolizer/constants.js

 // Copyright 2014 the V8 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.
 
 var MAX_RANK_SENTINEL = 0;
 var GRAPH_MARGIN = 250;
 var WIDTH = 'width';
 var HEIGHT = 'height';
 var VISIBILITY = 'visibility';
 var SOURCE_PANE_ID = 'left';
 var SOURCE_COLLAPSE_ID = 'source-shrink';
 var SOURCE_EXPAND_ID = 'source-expand';
 var INTERMEDIATE_PANE_ID = 'middle';
 var EMPTY_PANE_ID = 'empty';
 var GRAPH_PANE_ID = 'graph';
 var SCHEDULE_PANE_ID = 'schedule';
 var GENERATED_PANE_ID = 'right';
 var DISASSEMBLY_PANE_ID = 'disassembly';
 var DISASSEMBLY_COLLAPSE_ID = 'disassembly-shrink';
 var DISASSEMBLY_EXPAND_ID = 'disassembly-expand';
 var COLLAPSE_PANE_BUTTON_VISIBLE = 'button-input';
 var COLLAPSE_PANE_BUTTON_INVISIBLE = 'button-input-invisible';
-var PROF_HIGH = 5;
-var PROF_MED = 0.5;
+var UNICODE_BLOCK = '▋';
+var PROF_COLS = [
+  { perc:   0, col: { r: 255, g: 255, b: 255 } },
+  { perc: 0.5, col: { r: 255, g: 255, b: 128 } },
+  { perc:   5, col: { r: 255, g: 128, b:   0 } },
+  { perc:  15, col: { r: 255, g:   0, b:   0 } },
+  { perc: 100, col: { r:   0, g:   0, b:   0 } }
+];