Video player: Interpret paper-slider's ratio property properly.

paper-slider v2.0.2 has a breaking change.
PolymerElements/paper-slider#194
|ratio| property used to return a value in [0, 1], but now it returns a value in
[0, 100].
Making video player to catch up this change by dividing |ratio| property by 100.

Bug: 752283
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: Iad994a2dd7f8a6e5b77698a0deec0812c70fb045
Reviewed-on: https://chromium-review.googlesource.com/646153
Reviewed-by: Yoshiki Iguchi <[email protected]>
Commit-Queue: Naoki Fukino <[email protected]>
Cr-Commit-Position: refs/heads/master@{#499126}

ui/file_manager/video_player/js/media_controls.js

@@ -377,7 +377,7 @@ MediaControls.prototype.initTimeControls = function(opt_parent) {
   this.progressSlider_.setAttribute('aria-label',
       str('MEDIA_PLAYER_SEEK_SLIDER_LABEL'));
   this.progressSlider_.addEventListener('change', function(event) {
-    this.onProgressChange_(this.progressSlider_.ratio);
+    this.onProgressChange_(this.progressSlider_.ratio / 100);
   }.bind(this));
   this.progressSlider_.addEventListener(
       'immediate-value-change',
@@ -452,7 +452,7 @@ MediaControls.prototype.skip_ = function(sec) {
     this.progressSlider_.value = Math.max(Math.min(
         this.progressSlider_.value + stepsToSkip,
         this.progressSlider_.max), 0);
-    this.onProgressChange_(this.progressSlider_.ratio);
+    this.onProgressChange_(this.progressSlider_.ratio / 100);
   }
 };
 
@@ -582,7 +582,7 @@ MediaControls.prototype.initVolumeControls = function(opt_parent) {
   this.volume_.setAttribute('aria-label',
       str('MEDIA_PLAYER_VOLUME_SLIDER_LABEL'));
   this.volume_.addEventListener('change', function(event) {
-    this.onVolumeChange_(this.volume_.ratio);
+    this.onVolumeChange_(this.volume_.ratio / 100);
   }.bind(this));
   this.volume_.addEventListener('immediate-value-change', function(event) {
     this.onVolumeDrag_();