Invert pain to comfort throughout tracing.

tracing/tracing/extras/rail/load_interaction_record.html

Index: tracing/tracing/extras/rail/load_interaction_record.html
diff --git a/tracing/tracing/extras/rail/load_interaction_record.html b/tracing/tracing/extras/rail/load_interaction_record.html
index d401a18947a41bec80af5d3c70783afddca91c68..d51bec67883418373e4e00376a12d101c69db731 100644
--- a/tracing/tracing/extras/rail/load_interaction_record.html
+++ b/tracing/tracing/extras/rail/load_interaction_record.html
@@ -13,9 +13,9 @@ found in the LICENSE file.
  * @fileoverview The Load phase of RAIL.
  */
 tr.exportTo('tr.e.rail', function() {
-  // The computeNormalizedPain regions are delineated at these millisecond
+  // The computeNormalizedComfort regions are delineated at these millisecond
   // latency values.
-  var PAIN_LATENCY_REGIONS = [1000, 5000, 20000, 60000];
+  var COMFORT_LATENCY_REGIONS = [1000, 5000, 20000, 60000];
 
   function LoadInteractionRecord(start, duration) {
     tr.e.rail.RAILInteractionRecord.call(
@@ -26,13 +26,13 @@ tr.exportTo('tr.e.rail', function() {
   LoadInteractionRecord.prototype = {
     __proto__: tr.e.rail.RAILInteractionRecord.prototype,
 
-    get normalizedUserPain() {
+    get normalizedUserComfort() {
       // https://www.desmos.com/calculator/ddcv31509h
-      return tr.e.rail.computeNormalizedPain(this.duration, {
-        minValueExponential: PAIN_LATENCY_REGIONS[0],
-        minValueLinear: PAIN_LATENCY_REGIONS[1],
-        minValueLogarithmic: PAIN_LATENCY_REGIONS[2],
-        maxValue: PAIN_LATENCY_REGIONS[3]
+      return 1 - tr.e.rail.computeNormalizedComfort(this.duration, {
+        minValueExponential: COMFORT_LATENCY_REGIONS[0],
+        minValueLinear: COMFORT_LATENCY_REGIONS[1],
+        minValueLogarithmic: COMFORT_LATENCY_REGIONS[2],
+        maxValue: COMFORT_LATENCY_REGIONS[3]
       });
     }
   };