Move the casting icon to media controls.

ui/file_manager/video_player/css/header.css

Index: ui/file_manager/video_player/css/header.css
diff --git a/ui/file_manager/video_player/css/header.css b/ui/file_manager/video_player/css/header.css
index 591cf84154db13d1422fa3aff09cff8c82176e41..06c27b6d1d8d37744760aa7b063ad8ec5824b358 100644
--- a/ui/file_manager/video_player/css/header.css
+++ b/ui/file_manager/video_player/css/header.css
@@ -21,9 +21,9 @@
   color: white;
   flex-grow: 1;
   font-size: 16px;
-  height: 16px;
+  line-height: 45px;
   overflow: hidden;
-  padding: 15px;
+  padding-left: 15px;
   text-overflow: ellipsis;
   white-space: nowrap;
 }
@@ -69,38 +69,6 @@
   width: 32px;
 }
 
-#video-player > .header > button.cast-button {
-  background-image: -webkit-image-set(
-      url(../images/100/cast_off.png) 1x,
-      url(../images/200/cast_off.png) 2x);
-}
-
-#video-player[casting] > .header > button.cast-button {
-  background-image: -webkit-image-set(
-      url(../images/100/cast_on.png) 1x,
-      url(../images/200/cast_on.png) 2x);
-}
-
-#video-player > .header > button.cast-button:hover {
-  background-image: -webkit-image-set(
-      url(../images/100/cast_off_hover.png) 1x,
-      url(../images/200/cast_off_hover.png) 2x);
-}
-
-#video-player[casting] > .header > button.cast-button:hover {
-  background-image: -webkit-image-set(
-      url(../images/100/cast_on_hover.png) 1x,
-      url(../images/200/cast_on_hover.png) 2x);
-}
-
-#video-player > .header > button.cast-button {
-  display: none;
-}
-
-#video-player[cast-available][castable] > .header > button.cast-button {
-  display: block;
-}
-
 #video-player > .header > button.minimize-button {
   background-image: -webkit-image-set(
       url(chrome://resources/images/apps/topbar_button_minimize.png) 1x,