DevTools: Make the colors for the same URL be the same for all recording.

third_party/WebKit/Source/devtools/front_end/ui_lazy/FlameChart.js

Index: third_party/WebKit/Source/devtools/front_end/ui_lazy/FlameChart.js
diff --git a/third_party/WebKit/Source/devtools/front_end/ui_lazy/FlameChart.js b/third_party/WebKit/Source/devtools/front_end/ui_lazy/FlameChart.js
index e1adb37f900b8f226572636d60f727be9996cc34..6d8e58c9f470c7291fa286324213da89ae0cd4b0 100644
--- a/third_party/WebKit/Source/devtools/front_end/ui_lazy/FlameChart.js
+++ b/third_party/WebKit/Source/devtools/front_end/ui_lazy/FlameChart.js
@@ -310,9 +310,9 @@ WebInspector.FlameChart.Events = {
 /**
  * @constructor
  * @param {!{min: number, max: number}|number=} hueSpace
- * @param {!{min: number, max: number, count: number}|number=} satSpace
- * @param {!{min: number, max: number, count: number}|number=} lightnessSpace
- * @param {!{min: number, max: number, count: number}|number=} alphaSpace
+ * @param {!{min: number, max: number, count: (number|undefined)}|number=} satSpace
+ * @param {!{min: number, max: number, count: (number|undefined)}|number=} lightnessSpace
+ * @param {!{min: number, max: number, count: (number|undefined)}|number=} alphaSpace
  */
 WebInspector.FlameChart.ColorGenerator = function(hueSpace, satSpace, lightnessSpace, alphaSpace)
 {
@@ -355,46 +355,25 @@ WebInspector.FlameChart.ColorGenerator.prototype = {
     _generateColorForID: function(id)
     {
         var hash = String.hashCode(id);
-        var h = this._indexToDistinctValueInSpace(this._colors.size, this._hueSpace);
-        var s = this._indexToValueInSpace(hash, this._satSpace);
-        var l = this._indexToValueInSpace(hash, this._lightnessSpace);
-        var a = this._indexToValueInSpace(hash, this._alphaSpace);
+        var h = this._indexToValueInSpace(hash, this._hueSpace);
+        var s = this._indexToValueInSpace(hash >> 8, this._satSpace);
+        var l = this._indexToValueInSpace(hash >> 16, this._lightnessSpace);
+        var a = this._indexToValueInSpace(hash >> 24, this._alphaSpace);
         return "hsla(" + h + ", " + s + "%, " + l + "%, " + a + ")";
     },
 
     /**
      * @param {number} index
-     * @param {!{min: number, max: number, count: number}|number} space
+     * @param {!{min: number, max: number, count: (number|undefined)}|number} space
      * @return {number}
      */
     _indexToValueInSpace: function(index, space)
     {
         if (typeof space === "number")
             return space;
-        index %= space.count;
-        return space.min + Math.floor(index / (space.count - 1) * (space.max - space.min));
-    },
-
-    /**
-     * @param {number} index
-     * @param {!{min: number, max: number}|number} space
-     * @return {number}
-     */
-    _indexToDistinctValueInSpace: function(index, space)
-    {
-        if (typeof space === "number")
-            return space;
-        index |= 0;
-        var result = 0;
-        var count = 0;
-        // Reverse bits in index.
-        do {
-            result = (result << 1) | (index & 1);
-            index >>= 1;
-            ++count;
-        } while (index);
-        result /= 1 << count;
-        return space.min + Math.floor(result * (space.max - space.min));
+        var count = space.count || space.max - space.min;
+        index %= count;
+        return space.min + Math.floor(index / (count - 1) * (space.max - space.min));
     }
 }