Revert of AudioPlayer: Update volume controls.

ui/file_manager/audio_player/elements/control_panel.css

Index: ui/file_manager/audio_player/elements/control_panel.css
diff --git a/ui/file_manager/audio_player/elements/control_panel.css b/ui/file_manager/audio_player/elements/control_panel.css
index 9a2b1989493935343391ffd999caad797acfdb97..78624e42e4dca8a8a60f739ea2a8fe162ffe7acb 100644
--- a/ui/file_manager/audio_player/elements/control_panel.css
+++ b/ui/file_manager/audio_player/elements/control_panel.css
@@ -13,11 +13,8 @@
   padding: 0;
 }
 
-:host([volume-slider-shown]) .controls {
-  height: 144px;
-}
-
-.controls .control-row {
+.controls .upper-controls,
+.controls .lower-controls {
   box-sizing: border-box;
   height: 48px;
   padding: 8px;
@@ -106,7 +103,7 @@
   opacity: 0; /* This class is intended to be used as invisible spacer. */
 }
 
-paper-slider {
+.time-controls > paper-slider {
   --paper-slider-active-color: rgb(66, 133, 244);
   --paper-slider-knob-color: rgb(64, 138, 241);
   flex: auto;
@@ -241,13 +238,17 @@
   top: -1px;
 }
 
-.volume-controls {
-  align-items: center;
-  background-color: rgb(235, 235, 235);
-  display: flex;
-  flex-direction: row;
-}
-
-.volume-controls paper-slider {
-  width: 100%;
-}
+/* Volume controls: sound button and volume slider */
+
+#volumeContainer {
+  border: 1px solid #ddd;
+  border-radius: 2px;
+  box-shadow: 0 2px 4px #777;
+  height: 110px;
+  position: fixed;
+  width: 32px;
+}
+
+#volumeContainer.default-hidden {
+  visibility: hidden;
+}