Fix MD display settings when the display supports a single resolution

chrome/browser/resources/settings/controls/settings_slider.js

Index: chrome/browser/resources/settings/controls/settings_slider.js
diff --git a/chrome/browser/resources/settings/controls/settings_slider.js b/chrome/browser/resources/settings/controls/settings_slider.js
index c6b9b59e007198601fa4935a3b07ec8cdf929234..33cec498d3d8ed40e11eb1c23ad404c27114232d 100644
--- a/chrome/browser/resources/settings/controls/settings_slider.js
+++ b/chrome/browser/resources/settings/controls/settings_slider.js
@@ -50,11 +50,16 @@ Polymer({
    * @private
    */
   onSliderChanged_: function() {
+    var sliderValue = (this.$.slider.immediateValue === undefined ||
+                       isNaN(this.$.slider.immediateValue))

[stevenjb, 2017/04/19 20:31:28]

Ah, yes, this is better, and it looks like isNan(undefined) returns true, so we
could remove the first test.

[afakhry, 2017/04/19 22:22:41]

Oh, awesome! This is actually better. Done!

+                         ? this.$.slider.value
+                         : this.$.slider.immediateValue;
+
     var newValue;
     if (this.tickValues && this.tickValues.length > 0)
-      newValue = this.tickValues[this.$.slider.immediateValue];
+      newValue = this.tickValues[sliderValue];
     else
-      newValue = this.$.slider.immediateValue;
+      newValue = sliderValue;
 
     this.set('pref.value', newValue);
   },