webui: Change all url('...') and url("...") to just url(...).

Same meaning; less bytes.

R=estade@chromium.org, jamiewalch@chromium.org, sbc@chromium.org
TBR=cpu@chromium.org
BUG=none
TEST=smaller chrome installer

Review URL: https://codereview.chromium.org/755223003

Cr-Commit-Position: refs/heads/master@{#305778}

8 files changed, 333 insertions, 333 deletions

diff --git a/ui/file_manager/audio_player/elements/control_panel.css b/ui/file_manager/audio_player/elements/control_panel.css
index a3f4f71..3dbc878 100644
--- a/ui/file_manager/audio_player/elements/control_panel.css
+++ b/ui/file_manager/audio_player/elements/control_panel.css
@@ -45,8 +45,8 @@
 
 .media-button:active {
   background-image: -webkit-image-set(
-      url('../assets/100/player_button_pressed.png') 1x,
-      url('../assets/200/player_button_pressed.png') 2x);
+      url(../assets/100/player_button_pressed.png) 1x,
+      url(../assets/200/player_button_pressed.png) 2x);
 }
 
 .media-button > div,
@@ -96,21 +96,21 @@
 
 .custom-slider.progress > input[type='range']::-webkit-slider-thumb {
   background-image: -webkit-image-set(
-      url('../assets/100/player_timeline_handler.png') 1x,
-      url('../assets/200/player_timeline_handler.png') 2x);
+      url(../assets/100/player_timeline_handler.png) 1x,
+      url(../assets/200/player_timeline_handler.png) 2x);
   width: 28px;
 }
 
 .custom-slider.progress > input[type='range']::-webkit-slider-thumb:hover {
   background-image: -webkit-image-set(
-      url('../assets/100/player_timeline_handler.png') 1x,
-      url('../assets/200/player_timeline_handler.png') 2x);
+      url(../assets/100/player_timeline_handler.png) 1x,
+      url(../assets/200/player_timeline_handler.png) 2x);
 }
 
 .custom-slider.progress > input[type='range']::-webkit-slider-thumb:active {
   background-image: -webkit-image-set(
-      url('../assets/100/player_timeline_handler_pressed.png') 1x,
-      url('../assets/200/player_timeline_handler_pressed.png') 2x);
+      url(../assets/100/player_timeline_handler_pressed.png) 1x,
+      url(../assets/200/player_timeline_handler_pressed.png) 2x);
 }
 
 .custom-slider.progress.disabled > input[type='range']::-webkit-slider-thumb {
@@ -152,8 +152,8 @@
 /* Custom slider bar (we hide the standard one). */
 .custom-slider > .bar {
   background-image: -webkit-image-set(
-      url('../assets/100/player_timeline_base_center.png') 1x,
-      url('../assets/200/player_timeline_base_center.png') 2x);
+      url(../assets/100/player_timeline_base_center.png) 1x,
+      url(../assets/200/player_timeline_base_center.png) 2x);
   /* In order to match the horizontal position of the standard slider bar
      left and right must be equal to 1/2 of the thumb icon width. */
   bottom: 15px;
@@ -174,8 +174,8 @@
 /* The filled portion of the slider bar to the left of the thumb. */
 .custom-slider > .bar > .filled {
   background-image: -webkit-image-set(
-      url('../assets/100/player_timeline_played_center.png') 1x,
-      url('../assets/200/player_timeline_played_center.png') 2x);
+      url(../assets/100/player_timeline_played_center.png) 1x,
+      url(../assets/200/player_timeline_played_center.png) 2x);
   border-left-style: none;
   border-right-style: none;
   left: 0;
@@ -190,16 +190,16 @@
 /* Left cap is always filled, should be the same color as .filled. */
 .custom-slider > .bar > .cap.left {
   background-image: -webkit-image-set(
-      url('../assets/100/player_timeline_played_left.png') 1x,
-      url('../assets/200/player_timeline_played_left.png') 2x);
+      url(../assets/100/player_timeline_played_left.png) 1x,
+      url(../assets/200/player_timeline_played_left.png) 2x);
   right: 100%;
 }
 
 /* Right cap is always not filled. */
 .custom-slider > .bar > .cap.right {
   background-image: -webkit-image-set(
-      url('../assets/100/player_timeline_base_right.png') 1x,
-      url('../assets/200/player_timeline_base_right.png') 2x);
+      url(../assets/100/player_timeline_base_right.png) 1x,
+      url(../assets/200/player_timeline_base_right.png) 2x);
   left: 100%;
 }
 
@@ -277,15 +277,15 @@
 
 .media-button.shuffle-mode > label > .icon {
   background-image: -webkit-image-set(
-      url('../assets/100/player_button_shuffle.png') 1x,
-      url('../assets/200/player_button_shuffle.png') 2x);
+      url(../assets/100/player_button_shuffle.png) 1x,
+      url(../assets/200/player_button_shuffle.png) 2x);
   pointer-events: auto;
 }
 
 .media-button.shuffle-mode > label > input:checked + .icon {
   background-image: -webkit-image-set(
-      url('../assets/100/player_button_shuffle_active.png') 1x,
-      url('../assets/200/player_button_shuffle_active.png') 2x);
+      url(../assets/100/player_button_shuffle_active.png) 1x,
+      url(../assets/200/player_button_shuffle_active.png) 2x);
 }
 
 .media-button.repeat {
@@ -295,15 +295,15 @@
 
 .media-button.repeat > label > .icon {
   background-image: -webkit-image-set(
-      url('../assets/100/player_button_repeat.png') 1x,
-      url('../assets/200/player_button_repeat.png') 2x);
+      url(../assets/100/player_button_repeat.png) 1x,
+      url(../assets/200/player_button_repeat.png) 2x);
   pointer-events: auto;
 }
 
 .media-button.repeat > label > input:checked + .icon {
   background-image: -webkit-image-set(
-      url('../assets/100/player_button_repeat_active.png') 1x,
-      url('../assets/200/player_button_repeat_active.png') 2x);
+      url(../assets/100/player_button_repeat_active.png) 1x,
+      url(../assets/200/player_button_repeat_active.png) 2x);
 }
 
 .media-button.play {
@@ -313,14 +313,14 @@
 
 .media-button.play > .ended {
   background-image: -webkit-image-set(
-      url('../assets/100/player_button_play.png') 1x,
-      url('../assets/200/player_button_play.png') 2x);
+      url(../assets/100/player_button_play.png) 1x,
+      url(../assets/200/player_button_play.png) 2x);
 }
 
 .media-button.play > .playing {
   background-image: -webkit-image-set(
-      url('../assets/100/player_button_pause.png') 1x,
-      url('../assets/200/player_button_pause.png') 2x);
+      url(../assets/100/player_button_pause.png) 1x,
+      url(../assets/200/player_button_pause.png) 2x);
 }
 
 .media-button.previous {
@@ -330,8 +330,8 @@
 
 .media-button.previous > .normal {
   background-image: -webkit-image-set(
-      url('../assets/100/player_button_previous.png') 1x,
-      url('../assets/200/player_button_previous.png') 2x);
+      url(../assets/100/player_button_previous.png) 1x,
+      url(../assets/200/player_button_previous.png) 2x);
 }
 
 .media-button.next {
@@ -341,8 +341,8 @@
 
 .media-button.next > .normal {
   background-image: -webkit-image-set(
-      url('../assets/100/player_button_next.png') 1x,
-      url('../assets/200/player_button_next.png') 2x);
+      url(../assets/100/player_button_next.png) 1x,
+      url(../assets/200/player_button_next.png) 2x);
 }
 
 .media-button.volume {
@@ -352,21 +352,21 @@
 
 .media-button.volume > .normal {
   background-image: -webkit-image-set(
-      url('../assets/100/player_button_volume.png') 1x,
-      url('../assets/200/player_button_volume.png') 2x);
+      url(../assets/100/player_button_volume.png) 1x,
+      url(../assets/200/player_button_volume.png) 2x);
 }
 
 .media-button.volume > label > .icon {
   background-image: -webkit-image-set(
-      url('../assets/100/player_button_volume.png') 1x,
-      url('../assets/200/player_button_volume.png') 2x);
+      url(../assets/100/player_button_volume.png) 1x,
+      url(../assets/200/player_button_volume.png) 2x);
   pointer-events: auto;
 }
 
 .media-button.volume > label > input:checked + .icon {
   background-image: -webkit-image-set(
-      url('../assets/100/player_button_volume_active.png') 1x,
-      url('../assets/200/player_button_volume_active.png') 2x);
+      url(../assets/100/player_button_volume_active.png) 1x,
+      url(../assets/200/player_button_volume_active.png) 2x);
 }
 
 .media-button.playlist {
@@ -376,15 +376,15 @@
 
 .media-button.playlist > label > .icon {
   background-image: -webkit-image-set(
-      url('../assets/100/player_button_playlist.png') 1x,
-      url('../assets/200/player_button_playlist.png') 2x);
+      url(../assets/100/player_button_playlist.png) 1x,
+      url(../assets/200/player_button_playlist.png) 2x);
   pointer-events: auto;
 }
 
 .media-button.playlist > label > input:checked + .icon {
   background-image: -webkit-image-set(
-      url('../assets/100/player_button_playlist_active.png') 1x,
-      url('../assets/200/player_button_playlist_active.png') 2x);
+      url(../assets/100/player_button_playlist_active.png) 1x,
+      url(../assets/200/player_button_playlist_active.png) 2x);
 }
 
 
diff --git a/ui/file_manager/file_manager/foreground/css/common.css b/ui/file_manager/file_manager/foreground/css/common.css
index 27ce4ed..38dd745 100644
--- a/ui/file_manager/file_manager/foreground/css/common.css
+++ b/ui/file_manager/file_manager/foreground/css/common.css
@@ -35,8 +35,8 @@ input.common[type='checkbox'] {
 
 input.common[type='checkbox']:checked::after {
   background-image: -webkit-image-set(
-    url('../images/common/check_no_box.png') 1x,
-    url('../images/common/2x/check_no_box.png') 2x);
+    url(../images/common/check_no_box.png) 1x,
+    url(../images/common/2x/check_no_box.png) 2x);
   background-position: -3px -4px;
   background-repeat: no-repeat;
 }
@@ -47,15 +47,15 @@ input.common[type='checkbox'].white {
 
 input.common[type='checkbox'].white:not(:checked)::after {
   background-image: -webkit-image-set(
-    url('../images/common/checkbox_white_unchecked.png') 1x,
-    url('../images/common/2x/checkbox_white_unchecked.png') 2x);
+    url(../images/common/checkbox_white_unchecked.png) 1x,
+    url(../images/common/2x/checkbox_white_unchecked.png) 2x);
   background-position: -1px 0;
 }
 
 input.common[type='checkbox'].white:checked::after {
   background-image: -webkit-image-set(
-    url('../images/common/checkbox_white_checked.png') 1x,
-    url('../images/common/2x/checkbox_white_checked.png') 2x);
+    url(../images/common/checkbox_white_checked.png) 1x,
+    url(../images/common/2x/checkbox_white_checked.png) 2x);
   background-position: -1px 0;
 }
 
@@ -79,8 +79,8 @@ input.common[type='checkbox']::after {
 
 .bubble .pointer {
   background: -webkit-image-set(
-    url('../images/common/bubble_point_white.png') 1x,
-    url('../images/common/2x/bubble_point_white.png') 2x);
+    url(../images/common/bubble_point_white.png) 1x,
+    url(../images/common/2x/bubble_point_white.png) 2x);
   display: block;
   height: 11px;
   left: 24px;
@@ -101,8 +101,8 @@ input.common[type='checkbox']::after {
 
 .bubble .close-x {
   background: -webkit-image-set(
-    url('../images/common/close_x_gray.png') 1x,
-    url('../images/common/2x/close_x_gray.png') 2x);
+    url(../images/common/close_x_gray.png) 1x,
+    url(../images/common/2x/close_x_gray.png) 2x);
   height: 21px;
   opacity: 0.3;
   position: absolute;
@@ -150,8 +150,8 @@ input.common[type='checkbox']::after {
 
 span.disclosureindicator {
   background-image: -webkit-image-set(
-    url('../images/common/disclosure_arrow_dk_grey.png') 1x,
-    url('../images/common/2x/disclosure_arrow_dk_grey.png') 2x);
+    url(../images/common/disclosure_arrow_dk_grey.png) 1x,
+    url(../images/common/2x/disclosure_arrow_dk_grey.png) 2x);
   background-position: center;
   background-repeat: no-repeat;
   display: inline-block;
@@ -250,8 +250,8 @@ menu.chrome-menu > hr {
 
 menu.chrome-menu > menuitem[checked] {
   background-image: -webkit-image-set(
-    url('../images/common/check_no_box.png') 1x,
-    url('../images/common/2x/check_no_box.png') 2x);
+    url(../images/common/check_no_box.png) 1x,
+    url(../images/common/2x/check_no_box.png) 2x);
 }
 
 menu.chrome-menu > [checked]::before {
@@ -276,8 +276,8 @@ select {
   background-repeat: no-repeat;
   border: 5px solid transparent;
   border-image: -webkit-image-set(
-    url('chrome://resources/images/apps/button.png') 1x,
-    url('chrome://resources/images/2x/apps/button.png')
+    url(chrome://resources/images/apps/button.png) 1x,
+    url(chrome://resources/images/2x/apps/button.png)
         2x) 5 / 5px / 2px repeat;
   box-sizing: content-box;
   color: rgb(34, 34, 34);
@@ -302,8 +302,8 @@ input[type='button']:hover,
 input[type='submit']:hover,
 select:hover {
   border-image: -webkit-image-set(
-    url('chrome://resources/images/apps/button_hover.png') 1x,
-    url('chrome://resources/images/2x/apps/button_hover.png')
+    url(chrome://resources/images/apps/button_hover.png) 1x,
+    url(chrome://resources/images/2x/apps/button_hover.png)
         2x) 5 fill / 5px / 2px repeat;
   color: #222;
 }
@@ -312,8 +312,8 @@ button:active,
 input[type='button']:active,
 input[type='submit']:active {
   border-image: -webkit-image-set(
-    url('chrome://resources/images/apps/button_pressed.png') 1x,
-    url('chrome://resources/images/2x/apps/button_pressed.png')
+    url(chrome://resources/images/apps/button_pressed.png) 1x,
+    url(chrome://resources/images/2x/apps/button_pressed.png)
         2x) 5 fill / 5px / 2px repeat;
   color: #333;
 }
@@ -327,8 +327,8 @@ input[type='submit'][disabled]:hover {
   background-color: rgb(250, 250, 250);
   background-image: none;
   border-image: -webkit-image-set(
-    url('chrome://resources/images/apps/button.png') 1x,
-    url('chrome://resources/images/2x/apps/button.png')
+    url(chrome://resources/images/apps/button.png) 1x,
+    url(chrome://resources/images/2x/apps/button.png)
         2x) 5 fill / 5px / 2px repeat;
   color: rgb(150, 150, 150);
 }
@@ -488,7 +488,7 @@ html[dir='rtl'] .entry-name {
 }
 
 .cr-dialog-close {
-  background: url('chrome://theme/IDR_CLOSE_DIALOG') center no-repeat;
+  background: url(chrome://theme/IDR_CLOSE_DIALOG) center no-repeat;
   display: inline-block;
   height: 44px;
   opacity: 0.7;
@@ -499,9 +499,9 @@ html[dir='rtl'] .entry-name {
 }
 
 .cr-dialog-close:hover {
-  background-image: url('chrome://theme/IDR_CLOSE_DIALOG_H');
+  background-image: url(chrome://theme/IDR_CLOSE_DIALOG_H);
 }
 
 .cr-dialog-close:active {
-  background-image: url('chrome://theme/IDR_CLOSE_DIALOG_P');
+  background-image: url(chrome://theme/IDR_CLOSE_DIALOG_P);
 }
diff --git a/ui/file_manager/file_manager/foreground/css/drive_welcome.css b/ui/file_manager/file_manager/foreground/css/drive_welcome.css
index 49776cd..900185b 100644
--- a/ui/file_manager/file_manager/foreground/css/drive_welcome.css
+++ b/ui/file_manager/file_manager/foreground/css/drive_welcome.css
@@ -12,8 +12,8 @@
 
 .drive-welcome-icon {
   background-image: -webkit-image-set(
-    url('../images/files/ui/drive_logo.png') 1x,
-    url('../images/files/ui/2x/drive_logo.png') 2x);
+    url(../images/files/ui/drive_logo.png) 1x,
+    url(../images/files/ui/2x/drive_logo.png) 2x);
   background-repeat: no-repeat;
 }
 
diff --git a/ui/file_manager/file_manager/foreground/css/file_manager.css b/ui/file_manager/file_manager/foreground/css/file_manager.css
index e5172a3..3d7b168 100644
--- a/ui/file_manager/file_manager/foreground/css/file_manager.css
+++ b/ui/file_manager/file_manager/foreground/css/file_manager.css
@@ -286,8 +286,8 @@ div.splitter {
 
 #directory-tree .tree-row > div.root-eject {
   background: -webkit-image-set(
-      url('../images/files/ui/eject.png') 1x,
-      url('../images/files/ui/2x/eject.png') 2x) no-repeat center;
+      url(../images/files/ui/eject.png) 1x,
+      url(../images/files/ui/2x/eject.png) 2x) no-repeat center;
   cursor: pointer;
   flex: none;
   height: 20px;
@@ -299,8 +299,8 @@ div.splitter {
 
 #directory-tree:focus .tree-row[selected] > div.root-eject {
   background: -webkit-image-set(
-      url('../images/files/ui/eject_white.png') 1x,
-      url('../images/files/ui/2x/eject_white.png') 2x) no-repeat center;
+      url(../images/files/ui/eject_white.png) 1x,
+      url(../images/files/ui/2x/eject_white.png) 2x) no-repeat center;
   opacity: 1;
 }
 
@@ -417,14 +417,14 @@ div.splitter {
 
 .topbutton-bar .view-button.table {
   background-image: -webkit-image-set(
-      url('../images/files/ui/button_list_view.png') 1x,
-      url('../images/files/ui/2x/button_list_view.png') 2x);
+      url(../images/files/ui/button_list_view.png) 1x,
+      url(../images/files/ui/2x/button_list_view.png) 2x);
 }
 
 .topbutton-bar .view-button.grid {
   background-image: -webkit-image-set(
-      url('../images/files/ui/button_mosaic_view.png') 1x,
-      url('../images/files/ui/2x/button_mosaic_view.png') 2x);
+      url(../images/files/ui/button_mosaic_view.png) 1x,
+      url(../images/files/ui/2x/button_mosaic_view.png) 2x);
 }
 
 /* Container for the detail and thumbnail list views. */
@@ -521,8 +521,8 @@ div.splitter {
 
 .breadcrumbs .separator {
   background-image: -webkit-image-set(
-    url('../images/files/ui/breadcrumb-separator.png') 1x,
-    url('../images/files/ui/2x/breadcrumb-separator.png') 2x);
+    url(../images/files/ui/breadcrumb-separator.png) 1x,
+    url(../images/files/ui/2x/breadcrumb-separator.png) 2x);
   background-position: center center;
   background-repeat: no-repeat;
   flex: none;
@@ -609,8 +609,8 @@ html[dir='rtl'] .breadcrumbs .separator {
   align-items: center;
   background-color: #f0f0f0;
   background-image: -webkit-image-set(
-    url('../images/files/ui/warning_icon_square.png') 1x,
-    url('../images/files/ui/2x/warning_icon_square.png') 2x);
+    url(../images/files/ui/warning_icon_square.png) 1x,
+    url(../images/files/ui/2x/warning_icon_square.png) 2x);
   background-position: 15px center;
   background-repeat: no-repeat;
   color: #666;
@@ -660,8 +660,8 @@ html[dir='rtl'] .breadcrumbs .separator {
 
 .volume-warning .drive-icon {
   background-image: -webkit-image-set(
-    url('../images/files/ui/drive_logo.png') 1x,
-    url('../images/files/ui/2x/drive_logo.png') 2x);
+    url(../images/files/ui/drive_logo.png) 1x,
+    url(../images/files/ui/2x/drive_logo.png) 2x);
   background-position: center;
   background-repeat: no-repeat;
   background-size: 25px 22px;
@@ -752,8 +752,8 @@ body[type='full-page'] .detail-name .detail-icon {
 
 .imported .badge {
   background-image: -webkit-image-set(
-      url('../images/files/ui/drive_badge.png') 1x,
-      url('../images/files/ui/2x/drive_badge.png') 2x);
+      url(../images/files/ui/drive_badge.png) 1x,
+      url(../images/files/ui/2x/drive_badge.png) 2x);
   height: 16px;
   position: absolute;
   right: 7px;
@@ -998,8 +998,8 @@ li[renaming=''] .filename-label {
 /* Table splitter element */
 .table-header-splitter {
   background-image: -webkit-image-set(
-    url('../images/files/ui/vertical_separator.png') 1x,
-    url('../images/files/ui/2x/vertical_separator.png') 2x);
+    url(../images/files/ui/vertical_separator.png) 1x,
+    url(../images/files/ui/2x/vertical_separator.png) 2x);
   background-position: center;
   background-repeat: repeat-y;
   height: 20px;
@@ -1021,8 +1021,8 @@ li[renaming=''] .filename-label {
 .table-header-sort-image-desc::after {
   -webkit-padding-start: 13px;
   background-image: -webkit-image-set(
-    url('../images/files/ui/sort_desc.png') 1x,
-    url('../images/files/ui/2x/sort_desc.png') 2x);
+    url(../images/files/ui/sort_desc.png) 1x,
+    url(../images/files/ui/2x/sort_desc.png) 2x);
   background-position: center center;
   background-repeat: no-repeat;
   color: #888;
@@ -1034,8 +1034,8 @@ li[renaming=''] .filename-label {
 .table-header-sort-image-asc::after {
   -webkit-padding-start: 13px;
   background-image: -webkit-image-set(
-    url('../images/files/ui/sort_asc.png') 1x,
-    url('../images/files/ui/2x/sort_asc.png') 2x);
+    url(../images/files/ui/sort_asc.png) 1x,
+    url(../images/files/ui/2x/sort_asc.png) 2x);
   background-position: center center;
   background-repeat: no-repeat;
   color: #888;
@@ -1489,15 +1489,15 @@ list.autocomplete-suggestions > li > div.detail-text em {
 
 list.autocomplete-suggestions > li > div[search-icon] {
   background: -webkit-image-set(
-      url('../images/files/ui/search_icon_active.png') 1x,
-      url('../images/files/ui/2x/search_icon_active.png') 2x) center no-repeat;
+      url(../images/files/ui/search_icon_active.png) 1x,
+      url(../images/files/ui/2x/search_icon_active.png) 2x) center no-repeat;
 }
 
 list.autocomplete-suggestions > li[selected] > div[search-icon],
 list.autocomplete-suggestions > li[lead] > div[search-icon] {
   background: -webkit-image-set(
-      url('../images/files/ui/search_icon_white.png') 1x,
-      url('../images/files/ui/2x/search_icon_white.png') 2x) center no-repeat;
+      url(../images/files/ui/search_icon_white.png) 1x,
+      url(../images/files/ui/2x/search_icon_white.png) 2x) center no-repeat;
 }
 
 list.autocomplete-suggestions > [selected],
@@ -1572,8 +1572,8 @@ list.autocomplete-suggestions > [lead] > div.detail-text em {
   -webkit-padding-end: 10px;
   -webkit-padding-start: 36px;
   background-image: -webkit-image-set(
-    url('chrome://theme/IDR_WEBSTORE_ICON_16') 1x,
-    url('chrome://theme/IDR_WEBSTORE_ICON_16@2x') 2x);
+    url(chrome://theme/IDR_WEBSTORE_ICON_16) 1x,
+    url(chrome://theme/IDR_WEBSTORE_ICON_16@2x) 2x);
   background-position: 12px center;
   background-repeat: no-repeat;
   color: #00f;
@@ -1590,8 +1590,8 @@ list.autocomplete-suggestions > [lead] > div.detail-text em {
 
 .error-dialog-frame .error-dialog-img {
   background-image: -webkit-image-set(
-    url('chrome://theme/IDR_ERROR_NETWORK_GENERIC') 1x,
-    url('chrome://theme/IDR_ERROR_NETWORK_GENERIC@2x') 2x);
+    url(chrome://theme/IDR_ERROR_NETWORK_GENERIC) 1x,
+    url(chrome://theme/IDR_ERROR_NETWORK_GENERIC@2x) 2x);
   background-position: center;
   background-repeat: no-repeat;
   height: 40px;
diff --git a/ui/file_manager/file_manager/foreground/css/file_types.css b/ui/file_manager/file_manager/foreground/css/file_types.css
index c725ae7..74617d9 100644
--- a/ui/file_manager/file_manager/foreground/css/file_types.css
+++ b/ui/file_manager/file_manager/foreground/css/file_types.css
@@ -5,8 +5,8 @@
 /* Small icons for file types, used in lists and menus. */
 [file-type-icon] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_GENERIC') 1x,
-      url('chrome://theme/IDR_FILETYPE_GENERIC@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_GENERIC) 1x,
+      url(chrome://theme/IDR_FILETYPE_GENERIC@2x) 2x);
   background-position: center;
   background-repeat: no-repeat;
   background-size: 16px 16px;
@@ -16,347 +16,347 @@ tree:focus .tree-item[selected] > .tree-row > [file-type-icon],
 list:focus [selected] [file-type-icon],
 list.autocomplete-suggestions [selected] [file-type-icon] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_GENERIC_WHITE') 1x,
-      url('chrome://theme/IDR_FILETYPE_GENERIC_WHITE@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_GENERIC_WHITE) 1x,
+      url(chrome://theme/IDR_FILETYPE_GENERIC_WHITE@2x) 2x);
 }
 
 [file-type-icon='archive'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_ARCHIVE') 1x,
-      url('chrome://theme/IDR_FILETYPE_ARCHIVE@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_ARCHIVE) 1x,
+      url(chrome://theme/IDR_FILETYPE_ARCHIVE@2x) 2x);
 }
 
 tree:focus .tree-item[selected] > .tree-row > [file-type-icon='archive'],
 list:focus [selected] [file-type-icon='archive'],
 list.autocomplete-suggestions [selected] [file-type-icon='archive'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_ARCHIVE_WHITE') 1x,
-      url('chrome://theme/IDR_FILETYPE_ARCHIVE_WHITE@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_ARCHIVE_WHITE) 1x,
+      url(chrome://theme/IDR_FILETYPE_ARCHIVE_WHITE@2x) 2x);
 }
 
 [file-type-icon='audio'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_AUDIO') 1x,
-      url('chrome://theme/IDR_FILETYPE_AUDIO@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_AUDIO) 1x,
+      url(chrome://theme/IDR_FILETYPE_AUDIO@2x) 2x);
 }
 
 tree:focus .tree-item[selected] > .tree-row > [file-type-icon='audio'],
 list:focus [selected] [file-type-icon='audio'],
 list.autocomplete-suggestions [selected] [file-type-icon='audio'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_AUDIO_WHITE') 1x,
-      url('chrome://theme/IDR_FILETYPE_AUDIO_WHITE@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_AUDIO_WHITE) 1x,
+      url(chrome://theme/IDR_FILETYPE_AUDIO_WHITE@2x) 2x);
 }
 
 [file-type-icon='excel'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_EXCEL') 1x,
-      url('chrome://theme/IDR_FILETYPE_EXCEL@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_EXCEL) 1x,
+      url(chrome://theme/IDR_FILETYPE_EXCEL@2x) 2x);
 }
 
 tree:focus .tree-item[selected] > .tree-row > [file-type-icon='excel'],
 list:focus [selected] [file-type-icon='excel'],
 list.autocomplete-suggestions [selected] [file-type-icon='excel'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_EXCEL_WHITE') 1x,
-      url('chrome://theme/IDR_FILETYPE_EXCEL_WHITE@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_EXCEL_WHITE) 1x,
+      url(chrome://theme/IDR_FILETYPE_EXCEL_WHITE@2x) 2x);
 }
 
 [file-type-icon='folder'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_FOLDER') 1x,
-      url('chrome://theme/IDR_FILETYPE_FOLDER@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_FOLDER) 1x,
+      url(chrome://theme/IDR_FILETYPE_FOLDER@2x) 2x);
 }
 
 .shared[file-type-icon='folder'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_FOLDER_SHARED') 1x,
-      url('chrome://theme/IDR_FILETYPE_FOLDER_SHARED@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_FOLDER_SHARED) 1x,
+      url(chrome://theme/IDR_FILETYPE_FOLDER_SHARED@2x) 2x);
 }
 
 tree:focus .tree-item[selected] > .tree-row > .shared[file-type-icon='folder'],
 list:focus [selected] .shared[file-type-icon='folder'],
 list.autocomplete-suggestions [selected] .shared[file-type-icon='folder'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_FOLDER_SHARED_WHITE') 1x,
-      url('chrome://theme/IDR_FILETYPE_FOLDER_SHARED_WHITE@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_FOLDER_SHARED_WHITE) 1x,
+      url(chrome://theme/IDR_FILETYPE_FOLDER_SHARED_WHITE@2x) 2x);
 }
 
 tree:focus .tree-item[selected] > .tree-row > [file-type-icon='folder'],
 list:focus [selected] [file-type-icon='folder'],
 list.autocomplete-suggestions [selected] [file-type-icon='folder'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_FOLDER_WHITE') 1x,
-      url('chrome://theme/IDR_FILETYPE_FOLDER_WHITE@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_FOLDER_WHITE) 1x,
+      url(chrome://theme/IDR_FILETYPE_FOLDER_WHITE@2x) 2x);
 }
 
 [file-type-icon='form'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_FORM') 1x,
-      url('chrome://theme/IDR_FILETYPE_FORM@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_FORM) 1x,
+      url(chrome://theme/IDR_FILETYPE_FORM@2x) 2x);
 }
 
 tree:focus .tree-item[selected] > .tree-row > [file-type-icon='form'],
 list:focus [selected] [file-type-icon='form'],
 list.autocomplete-suggestions [selected] [file-type-icon='form'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_FORM_WHITE') 1x,
-      url('chrome://theme/IDR_FILETYPE_FORM_WHITE@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_FORM_WHITE) 1x,
+      url(chrome://theme/IDR_FILETYPE_FORM_WHITE@2x) 2x);
 }
 
 [file-type-icon='gdoc'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_GDOC') 1x,
-      url('chrome://theme/IDR_FILETYPE_GDOC@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_GDOC) 1x,
+      url(chrome://theme/IDR_FILETYPE_GDOC@2x) 2x);
 }
 
 tree:focus .tree-item[selected] > .tree-row > [file-type-icon='gdoc'],
 list:focus [selected] [file-type-icon='gdoc'],
 list.autocomplete-suggestions [selected] [file-type-icon='gdoc'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_GDOC_WHITE') 1x,
-      url('chrome://theme/IDR_FILETYPE_GDOC_WHITE@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_GDOC_WHITE) 1x,
+      url(chrome://theme/IDR_FILETYPE_GDOC_WHITE@2x) 2x);
 }
 
 [file-type-icon='gdraw'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_GDRAW') 1x,
-      url('chrome://theme/IDR_FILETYPE_GDRAW@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_GDRAW) 1x,
+      url(chrome://theme/IDR_FILETYPE_GDRAW@2x) 2x);
 }
 
 tree:focus .tree-item[selected] > .tree-row > [file-type-icon='gdraw'],
 list:focus [selected] [file-type-icon='gdraw'],
 list.autocomplete-suggestions [selected] [file-type-icon='gdraw'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_GDRAW_WHITE') 1x,
-      url('chrome://theme/IDR_FILETYPE_GDRAW_WHITE@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_GDRAW_WHITE) 1x,
+      url(chrome://theme/IDR_FILETYPE_GDRAW_WHITE@2x) 2x);
 }
 
 [file-type-icon='glink'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_GLINK') 1x,
-      url('chrome://theme/IDR_FILETYPE_GLINK@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_GLINK) 1x,
+      url(chrome://theme/IDR_FILETYPE_GLINK@2x) 2x);
 }
 
 tree:focus .tree-item[selected] > .tree-row > [file-type-icon='glink'],
 list:focus [selected] [file-type-icon='glink'],
 list.autocomplete-suggestions [selected] [file-type-icon='glink'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_GLINK_WHITE') 1x,
-      url('chrome://theme/IDR_FILETYPE_GLINK_WHITE@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_GLINK_WHITE) 1x,
+      url(chrome://theme/IDR_FILETYPE_GLINK_WHITE@2x) 2x);
 }
 
 [file-type-icon='gsheet'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_GSHEET') 1x,
-      url('chrome://theme/IDR_FILETYPE_GSHEET@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_GSHEET) 1x,
+      url(chrome://theme/IDR_FILETYPE_GSHEET@2x) 2x);
 }
 
 tree:focus .tree-item[selected] > .tree-row > [file-type-icon='gsheet'],
 list:focus [selected] [file-type-icon='gsheet'],
 list.autocomplete-suggestions [selected] [file-type-icon='gsheet'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_GSHEET_WHITE') 1x,
-      url('chrome://theme/IDR_FILETYPE_GSHEET_WHITE@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_GSHEET_WHITE) 1x,
+      url(chrome://theme/IDR_FILETYPE_GSHEET_WHITE@2x) 2x);
 }
 
 [file-type-icon='gslides'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_GSLIDES') 1x,
-      url('chrome://theme/IDR_FILETYPE_GSLIDES@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_GSLIDES) 1x,
+      url(chrome://theme/IDR_FILETYPE_GSLIDES@2x) 2x);
 }
 
 tree:focus .tree-item[selected] > .tree-row > [file-type-icon='gslides'],
 list:focus [selected] [file-type-icon='gslides'],
 list.autocomplete-suggestions [selected] [file-type-icon='gslides'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_GSLIDES_WHITE') 1x,
-      url('chrome://theme/IDR_FILETYPE_GSLIDES_WHITE@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_GSLIDES_WHITE) 1x,
+      url(chrome://theme/IDR_FILETYPE_GSLIDES_WHITE@2x) 2x);
 }
 
 [file-type-icon='gtable'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_GTABLE') 1x,
-      url('chrome://theme/IDR_FILETYPE_GTABLE@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_GTABLE) 1x,
+      url(chrome://theme/IDR_FILETYPE_GTABLE@2x) 2x);
 }
 
 tree:focus .tree-item[selected] > .tree-row > [file-type-icon='gtable'],
 list:focus [selected] [file-type-icon='gtable'],
 list.autocomplete-suggestions [selected] [file-type-icon='gtable'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_GTABLE_WHITE') 1x,
-      url('chrome://theme/IDR_FILETYPE_GTABLE_WHITE@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_GTABLE_WHITE) 1x,
+      url(chrome://theme/IDR_FILETYPE_GTABLE_WHITE@2x) 2x);
 }
 
 [file-type-icon='gform'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_FORM') 1x,
-      url('chrome://theme/IDR_FILETYPE_FORM@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_FORM) 1x,
+      url(chrome://theme/IDR_FILETYPE_FORM@2x) 2x);
 }
 
 tree:focus .tree-item[selected] > .tree-row > [file-type-icon='gform'],
 list:focus [selected] [file-type-icon='gform'],
 list.autocomplete-suggestions [selected] [file-type-icon='gform'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_FORM_WHITE') 1x,
-      url('chrome://theme/IDR_FILETYPE_FORM_WHITE@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_FORM_WHITE) 1x,
+      url(chrome://theme/IDR_FILETYPE_FORM_WHITE@2x) 2x);
 }
 
 [file-type-icon='gmap'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_GMAP') 1x,
-      url('chrome://theme/IDR_FILETYPE_GMAP@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_GMAP) 1x,
+      url(chrome://theme/IDR_FILETYPE_GMAP@2x) 2x);
 }
 
 tree:focus .tree-item[selected] > .tree-row > [file-type-icon='gmap'],
 list:focus [selected] [file-type-icon='gmap'],
 list.autocomplete-suggestions [selected] [file-type-icon='gmap'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_GMAP_WHITE') 1x,
-      url('chrome://theme/IDR_FILETYPE_GMAP_WHITE@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_GMAP_WHITE) 1x,
+      url(chrome://theme/IDR_FILETYPE_GMAP_WHITE@2x) 2x);
 }
 
 [file-type-icon='image'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_IMAGE') 1x,
-      url('chrome://theme/IDR_FILETYPE_IMAGE@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_IMAGE) 1x,
+      url(chrome://theme/IDR_FILETYPE_IMAGE@2x) 2x);
 }
 
 tree:focus .tree-item[selected] > .tree-row > [file-type-icon='image'],
 list:focus [selected] [file-type-icon='image'],
 list.autocomplete-suggestions [selected] [file-type-icon='image'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_IMAGE_WHITE') 1x,
-      url('chrome://theme/IDR_FILETYPE_IMAGE_WHITE@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_IMAGE_WHITE) 1x,
+      url(chrome://theme/IDR_FILETYPE_IMAGE_WHITE@2x) 2x);
 }
 
 [file-type-icon='pdf'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_PDF') 1x,
-      url('chrome://theme/IDR_FILETYPE_PDF@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_PDF) 1x,
+      url(chrome://theme/IDR_FILETYPE_PDF@2x) 2x);
 }
 
 tree:focus .tree-item[selected] > .tree-row > [file-type-icon='pdf'],
 list:focus [selected] [file-type-icon='pdf'],
 list.autocomplete-suggestions [selected] [file-type-icon='pdf'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_PDF_WHITE') 1x,
-      url('chrome://theme/IDR_FILETYPE_PDF_WHITE@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_PDF_WHITE) 1x,
+      url(chrome://theme/IDR_FILETYPE_PDF_WHITE@2x) 2x);
 }
 
 [file-type-icon='ppt'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_PPT') 1x,
-      url('chrome://theme/IDR_FILETYPE_PPT@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_PPT) 1x,
+      url(chrome://theme/IDR_FILETYPE_PPT@2x) 2x);
 }
 
 tree:focus .tree-item[selected] > .tree-row > [file-type-icon='ppt'],
 list:focus [selected] [file-type-icon='ppt'],
 list.autocomplete-suggestions [selected] [file-type-icon='ppt'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_PPT_WHITE') 1x,
-      url('chrome://theme/IDR_FILETYPE_PPT_WHITE@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_PPT_WHITE) 1x,
+      url(chrome://theme/IDR_FILETYPE_PPT_WHITE@2x) 2x);
 }
 
 [file-type-icon='script'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_SCRIPT') 1x,
-      url('chrome://theme/IDR_FILETYPE_SCRIPT@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_SCRIPT) 1x,
+      url(chrome://theme/IDR_FILETYPE_SCRIPT@2x) 2x);
 }
 
 tree:focus .tree-item[selected] > .tree-row > [file-type-icon='script'],
 list:focus [selected] [file-type-icon='script'],
 list.autocomplete-suggestions [selected] [file-type-icon='script'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_SCRIPT_WHITE') 1x,
-      url('chrome://theme/IDR_FILETYPE_SCRIPT_WHITE@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_SCRIPT_WHITE) 1x,
+      url(chrome://theme/IDR_FILETYPE_SCRIPT_WHITE@2x) 2x);
 }
 
 [file-type-icon='sites'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_SITES') 1x,
-      url('chrome://theme/IDR_FILETYPE_SITES@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_SITES) 1x,
+      url(chrome://theme/IDR_FILETYPE_SITES@2x) 2x);
 }
 
 tree:focus .tree-item[selected] > .tree-row > [file-type-icon='sites'],
 list:focus [selected] [file-type-icon='sites'],
 list.autocomplete-suggestions [selected] [file-type-icon='sites'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_SITES_WHITE') 1x,
-      url('chrome://theme/IDR_FILETYPE_SITES_WHITE@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_SITES_WHITE) 1x,
+      url(chrome://theme/IDR_FILETYPE_SITES_WHITE@2x) 2x);
 }
 
 [file-type-icon='video'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_VIDEO') 1x,
-      url('chrome://theme/IDR_FILETYPE_VIDEO@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_VIDEO) 1x,
+      url(chrome://theme/IDR_FILETYPE_VIDEO@2x) 2x);
 }
 
 tree:focus .tree-item[selected] > .tree-row > [file-type-icon='video'],
 list:focus [selected] [file-type-icon='video'],
 list.autocomplete-suggestions [selected] [file-type-icon='video'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_VIDEO_WHITE') 1x,
-      url('chrome://theme/IDR_FILETYPE_VIDEO_WHITE@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_VIDEO_WHITE) 1x,
+      url(chrome://theme/IDR_FILETYPE_VIDEO_WHITE@2x) 2x);
 }
 
 [file-type-icon='word'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_WORD') 1x,
-      url('chrome://theme/IDR_FILETYPE_WORD@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_WORD) 1x,
+      url(chrome://theme/IDR_FILETYPE_WORD@2x) 2x);
 }
 
 tree:focus .tree-item[selected] > .tree-row > [file-type-icon='word'],
 list:focus [selected] [file-type-icon='word'],
 list.autocomplete-suggestions [selected] [file-type-icon='word'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_WORD_WHITE') 1x,
-      url('chrome://theme/IDR_FILETYPE_WORD_WHITE@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_WORD_WHITE) 1x,
+      url(chrome://theme/IDR_FILETYPE_WORD_WHITE@2x) 2x);
 }
 
 [file-type-icon='drive'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_DRIVE') 1x,
-      url('chrome://theme/IDR_FILETYPE_DRIVE@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_DRIVE) 1x,
+      url(chrome://theme/IDR_FILETYPE_DRIVE@2x) 2x);
 }
 
 /* Large generic thumbnails, used when a file does not have a thumbnail. */
 [generic-thumbnail] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_LARGE_GENERIC') 1x,
-      url('chrome://theme/IDR_FILETYPE_LARGE_GENERIC@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_LARGE_GENERIC) 1x,
+      url(chrome://theme/IDR_FILETYPE_LARGE_GENERIC@2x) 2x);
   background-position: center center;
   background-repeat: no-repeat;
 }
 
 [generic-thumbnail='audio'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_LARGE_AUDIO') 1x,
-      url('chrome://theme/IDR_FILETYPE_LARGE_AUDIO@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_LARGE_AUDIO) 1x,
+      url(chrome://theme/IDR_FILETYPE_LARGE_AUDIO@2x) 2x);
 }
 
 [generic-thumbnail='folder'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_LARGE_FOLDER') 1x,
-      url('chrome://theme/IDR_FILETYPE_LARGE_FOLDER@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_LARGE_FOLDER) 1x,
+      url(chrome://theme/IDR_FILETYPE_LARGE_FOLDER@2x) 2x);
 }
 
 .shared[generic-thumbnail='folder'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_LARGE_FOLDER_SHARED') 1x,
-      url('chrome://theme/IDR_FILETYPE_LARGE_FOLDER_SHARED@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_LARGE_FOLDER_SHARED) 1x,
+      url(chrome://theme/IDR_FILETYPE_LARGE_FOLDER_SHARED@2x) 2x);
 }
 
 [generic-thumbnail='image'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_LARGE_IMAGE') 1x,
-      url('chrome://theme/IDR_FILETYPE_LARGE_IMAGE@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_LARGE_IMAGE) 1x,
+      url(chrome://theme/IDR_FILETYPE_LARGE_IMAGE@2x) 2x);
 }
 
 [generic-thumbnail='video'] {
   background-image: -webkit-image-set(
-      url('chrome://theme/IDR_FILETYPE_LARGE_VIDEO') 1x,
-      url('chrome://theme/IDR_FILETYPE_LARGE_VIDEO@2x') 2x);
+      url(chrome://theme/IDR_FILETYPE_LARGE_VIDEO) 1x,
+      url(chrome://theme/IDR_FILETYPE_LARGE_VIDEO@2x) 2x);
 }
 
 /* Icons for volume types. */
@@ -364,125 +364,125 @@ list.autocomplete-suggestions [selected] [file-type-icon='word'] {
 [volume-type-icon='archive'] {
   background-position: center 2px;
   background-image: -webkit-image-set(
-      url('../images/volumes/black_archive.png') 1x,
-      url('../images/volumes/2x/black_archive.png') 2x);
+      url(../images/volumes/black_archive.png) 1x,
+      url(../images/volumes/2x/black_archive.png) 2x);
 }
 
 list:focus li[selected] [volume-type-icon='archive'],
 tree:focus .tree-item[selected] > .tree-row > [volume-type-icon='archive'] {
   background-image: -webkit-image-set(
-      url('../images/volumes/white_archive.png') 1x,
-      url('../images/volumes/2x/white_archive.png') 2x);
+      url(../images/volumes/white_archive.png) 1x,
+      url(../images/volumes/2x/white_archive.png) 2x);
 }
 
 [volume-type-icon='downloads'] {
   background-position: center 2px;
   background-image: -webkit-image-set(
-      url('../images/volumes/black_downloads.png') 1x,
-      url('../images/volumes/2x/black_downloads.png') 2x);
+      url(../images/volumes/black_downloads.png) 1x,
+      url(../images/volumes/2x/black_downloads.png) 2x);
 }
 
 list:focus li[selected] [volume-type-icon='downloads'],
 tree:focus .tree-item[selected] > .tree-row > [volume-type-icon='downloads'] {
   background-image: -webkit-image-set(
-      url('../images/volumes/white_downloads.png') 1x,
-      url('../images/volumes/2x/white_downloads.png') 2x);
+      url(../images/volumes/white_downloads.png) 1x,
+      url(../images/volumes/2x/white_downloads.png) 2x);
 }
 
 [volume-type-icon='drive'] {
   background-position: center 2px;
   background-image: -webkit-image-set(
-      url('../images/volumes/black_drive.png') 1x,
-      url('../images/volumes/2x/black_drive.png') 2x);
+      url(../images/volumes/black_drive.png) 1x,
+      url(../images/volumes/2x/black_drive.png) 2x);
 }
 
 list:focus li[selected] [volume-type-icon='drive'],
 tree:focus .tree-item[selected] > .tree-row > [volume-type-icon='drive'] {
   background-image: -webkit-image-set(
-      url('../images/volumes/white_drive.png') 1x,
-      url('../images/volumes/2x/white_drive.png') 2x);
+      url(../images/volumes/white_drive.png) 1x,
+      url(../images/volumes/2x/white_drive.png) 2x);
 }
 
 [volume-type-icon='drive_offline'] {
   background-position: center 2px;
   background-image: -webkit-image-set(
-      url('../images/volumes/black_offline.png') 1x,
-      url('../images/volumes/2x/black_offline.png') 2x);
+      url(../images/volumes/black_offline.png) 1x,
+      url(../images/volumes/2x/black_offline.png) 2x);
 }
 
 list:focus li[selected] [volume-type-icon='drive_offline'],
 tree:focus .tree-item[selected] > .tree-row >
     [volume-type-icon='drive_offline'] {
   background-image: -webkit-image-set(
-      url('../images/volumes/white_offline.png') 1x,
-      url('../images/volumes/2x/white_offline.png') 2x);
+      url(../images/volumes/white_offline.png) 1x,
+      url(../images/volumes/2x/white_offline.png) 2x);
 }
 
 [volume-type-icon='drive_shared_with_me'] {
   background-position: center 2px;
   background-image: -webkit-image-set(
-      url('../images/volumes/black_shared.png') 1x,
-      url('../images/volumes/2x/black_shared.png') 2x);
+      url(../images/volumes/black_shared.png) 1x,
+      url(../images/volumes/2x/black_shared.png) 2x);
 }
 
 list:focus li[selected] [volume-type-icon='drive_shared_with_me'],
 tree:focus .tree-item[selected] > .tree-row >
     [volume-type-icon='drive_shared_with_me'] {
   background-image: -webkit-image-set(
-      url('../images/volumes/white_shared.png') 1x,
-      url('../images/volumes/2x/white_shared.png') 2x);
+      url(../images/volumes/white_shared.png) 1x,
+      url(../images/volumes/2x/white_shared.png) 2x);
 }
 
 [volume-type-icon='drive_recent'] {
   background-position: center 2px;
   background-image: -webkit-image-set(
-      url('../images/volumes/black_recent.png') 1x,
-      url('../images/volumes/2x/black_recent.png') 2x);
+      url(../images/volumes/black_recent.png) 1x,
+      url(../images/volumes/2x/black_recent.png) 2x);
 }
 
 list:focus li[selected] [volume-type-icon='drive_recent'],
 tree:focus .tree-item[selected] > .tree-row >
     [volume-type-icon='drive_recent'] {
   background-image: -webkit-image-set(
-      url('../images/volumes/white_recent.png') 1x,
-      url('../images/volumes/2x/white_recent.png') 2x);
+      url(../images/volumes/white_recent.png) 1x,
+      url(../images/volumes/2x/white_recent.png) 2x);
 }
 
 [volume-type-icon='removable'] {
   background-position: center 2px;
   background-image: -webkit-image-set(
-      url('../images/volumes/black_usb.png') 1x,
-      url('../images/volumes/2x/black_usb.png') 2x);
+      url(../images/volumes/black_usb.png) 1x,
+      url(../images/volumes/2x/black_usb.png) 2x);
 }
 
 list:focus li[selected] [volume-type-icon='removable'],
 tree:focus .tree-item[selected] > .tree-row >
     [volume-type-icon='removable'] {
   background-image: -webkit-image-set(
-      url('../images/volumes/white_usb.png') 1x,
-      url('../images/volumes/2x/white_usb.png') 2x);
+      url(../images/volumes/white_usb.png) 1x,
+      url(../images/volumes/2x/white_usb.png) 2x);
 }
 
 [volume-type-icon='removable'][volume-subtype='sd'] {
   background-position: center 2px;
   background-image: -webkit-image-set(
-      url('../images/volumes/black_sd.png') 1x,
-      url('../images/volumes/2x/black_sd.png') 2x);
+      url(../images/volumes/black_sd.png) 1x,
+      url(../images/volumes/2x/black_sd.png) 2x);
 }
 
 list:focus li[selected] [volume-type-icon='removable'][volume-subtype='sd'],
 tree:focus .tree-item[selected] > .tree-row >
     [volume-type-icon='removable'][volume-subtype='sd'] {
   background-image: -webkit-image-set(
-      url('../images/volumes/white_sd.png') 1x,
-      url('../images/volumes/2x/white_sd.png') 2x);
+      url(../images/volumes/white_sd.png) 1x,
+      url(../images/volumes/2x/white_sd.png) 2x);
 }
 
 [volume-type-icon='removable'][volume-subtype='optical'] {
   background-position: center 2px;
   background-image: -webkit-image-set(
-      url('../images/volumes/black_optical.png') 1x,
-      url('../images/volumes/2x/black_optical.png') 2x);
+      url(../images/volumes/black_optical.png) 1x,
+      url(../images/volumes/2x/black_optical.png) 2x);
 }
 
 list:focus li[selected]
@@ -490,28 +490,28 @@ list:focus li[selected]
 tree:focus .tree-item[selected] > .tree-row >
     [volume-type-icon='removable'][volume-subtype='optical'] {
   background-image: -webkit-image-set(
-      url('../images/volumes/white_optical.png') 1x,
-      url('../images/volumes/2x/white_optical.png') 2x);
+      url(../images/volumes/white_optical.png) 1x,
+      url(../images/volumes/2x/white_optical.png) 2x);
 }
 
 [volume-type-icon='mtp'] {
   background-position: center 2px;
   background-image: -webkit-image-set(
-    url('../images/volumes/black_phone.png') 1x,
-    url('../images/volumes/2x/black_phone.png') 2x);
+    url(../images/volumes/black_phone.png) 1x,
+    url(../images/volumes/2x/black_phone.png) 2x);
 }
 
 list:focus li[selected] [volume-type-icon='mtp'],
 tree:focus .tree-item[selected] > .tree-row > [volume-type-icon='mtp'] {
   background-image: -webkit-image-set(
-    url('../images/volumes/white_phone.png') 1x,
-    url('../images/volumes/2x/white_phone.png') 2x);
+    url(../images/volumes/white_phone.png) 1x,
+    url(../images/volumes/2x/white_phone.png) 2x);
 }
 
 [volume-type-icon='removable'][volume-subtype='unknown'] {
   background-image: -webkit-image-set(
-      url('../images/volumes/black_hdd.png') 1x,
-      url('../images/volumes/2x/black_hdd.png') 2x);
+      url(../images/volumes/black_hdd.png) 1x,
+      url(../images/volumes/2x/black_hdd.png) 2x);
 }
 
 list:focus li[selected]
@@ -519,8 +519,8 @@ list:focus li[selected]
 tree:focus .tree-item[selected] > .tree-row >
     [volume-type-icon='removable'][volume-subtype='unknown'] {
   background-image: -webkit-image-set(
-      url('../images/volumes/white_hdd.png') 1x,
-      url('../images/volumes/2x/white_hdd.png') 2x);
+      url(../images/volumes/white_hdd.png) 1x,
+      url(../images/volumes/2x/white_hdd.png) 2x);
 }
 
 list:focus li[selected] [volume-type-icon='provided'],
diff --git a/ui/file_manager/video_player/css/cast_menu.css b/ui/file_manager/video_player/css/cast_menu.css
index 412bd73..1daacb4 100644
--- a/ui/file_manager/video_player/css/cast_menu.css
+++ b/ui/file_manager/video_player/css/cast_menu.css
@@ -67,8 +67,8 @@
 
 .cast-menu > [checked]:before {
   content: -webkit-image-set(
-      url('../images/media/media_check.png') 1x,
-      url('../images/media/2x/media_check.png') 2x);
+      url(../images/media/media_check.png) 1x,
+      url(../images/media/2x/media_check.png) 2x);
   height: 8px;
   margin: 0 10px;
   width: 10px;
diff --git a/ui/file_manager/video_player/css/media_controls.css b/ui/file_manager/video_player/css/media_controls.css
index 1287cd3..4383afb 100644
--- a/ui/file_manager/video_player/css/media_controls.css
+++ b/ui/file_manager/video_player/css/media_controls.css
@@ -190,62 +190,62 @@
 
 .media-button.play > .default.normal {
   background-image: -webkit-image-set(
-    url('../images/media/media_play.png') 1x,
-    url('../images/media/2x/media_play.png') 2x);
+    url(../images/media/media_play.png) 1x,
+    url(../images/media/2x/media_play.png) 2x);
 }
 
 .media-button.play > .default.hover {
   background-image: -webkit-image-set(
-    url('../images/media/media_play_hover.png') 1x,
-    url('../images/media/2x/media_play_hover.png') 2x);
+    url(../images/media/media_play_hover.png) 1x,
+    url(../images/media/2x/media_play_hover.png) 2x);
 }
 
 .media-button.play > .default.active {
   background-image: -webkit-image-set(
-    url('../images/media/media_play_down.png') 1x,
-    url('../images/media/2x/media_play_down.png') 2x);
+    url(../images/media/media_play_down.png) 1x,
+    url(../images/media/2x/media_play_down.png) 2x);
 }
 
 .media-button.play > .playing.normal {
   background-image: -webkit-image-set(
-    url('../images/media/media_pause.png') 1x,
-    url('../images/media/2x/media_pause.png') 2x);
+    url(../images/media/media_pause.png) 1x,
+    url(../images/media/2x/media_pause.png) 2x);
 }
 
 .media-button.play > .playing.hover {
   background-image: -webkit-image-set(
-    url('../images/media/media_pause_hover.png') 1x,
-    url('../images/media/2x/media_pause_hover.png') 2x);
+    url(../images/media/media_pause_hover.png) 1x,
+    url(../images/media/2x/media_pause_hover.png) 2x);
 }
 
 .media-button.play > .playing.active {
   background-image: -webkit-image-set(
-    url('../images/media/media_pause_down.png') 1x,
-    url('../images/media/2x/media_pause_down.png') 2x);
+    url(../images/media/media_pause_down.png) 1x,
+    url(../images/media/2x/media_pause_down.png) 2x);
 }
 
 .media-button.play > .ended.normal {
   background-image: -webkit-image-set(
-    url('../images/media/media_loop.png') 1x,
-    url('../images/media/2x/media_loop.png') 2x);
+    url(../images/media/media_loop.png) 1x,
+    url(../images/media/2x/media_loop.png) 2x);
 }
 
 .media-button.play > .ended.hover {
   background-image: -webkit-image-set(
-    url('../images/media/media_loop_hover.png') 1x,
-    url('../images/media/2x/media_loop_hover.png') 2x);
+    url(../images/media/media_loop_hover.png) 1x,
+    url(../images/media/2x/media_loop_hover.png) 2x);
 }
 
 .media-button.play > .ended.active {
   background-image: -webkit-image-set(
-    url('../images/media/media_loop_down.png') 1x,
-    url('../images/media/2x/media_loop_down.png') 2x);
+    url(../images/media/media_loop_down.png) 1x,
+    url(../images/media/2x/media_loop_down.png) 2x);
 }
 
 .media-button.play > .disabled {
   background-image: -webkit-image-set(
-    url('../images/media/media_play_disabled.png') 1x,
-    url('../images/media/2x/media_play_disabled.png') 2x);
+    url(../images/media/media_play_disabled.png) 1x,
+    url(../images/media/2x/media_play_disabled.png) 2x);
 }
 
 /* Time controls: a slider and a text time display. */
@@ -270,21 +270,21 @@
 
 .custom-slider.progress > input[type='range']::-webkit-slider-thumb {
   background-image: -webkit-image-set(
-    url('../images/media/media_slider_thumb.png') 1x,
-    url('../images/media/2x/media_slider_thumb.png') 2x);
+    url(../images/media/media_slider_thumb.png) 1x,
+    url(../images/media/2x/media_slider_thumb.png) 2x);
   width: 28px;
 }
 
 .custom-slider.progress > input[type='range']::-webkit-slider-thumb:hover {
   background-image: -webkit-image-set(
-    url('../images/media/media_slider_thumb_hover.png') 1x,
-    url('../images/media/2x/media_slider_thumb_hover.png') 2x);
+    url(../images/media/media_slider_thumb_hover.png) 1x,
+    url(../images/media/2x/media_slider_thumb_hover.png) 2x);
 }
 
 .custom-slider.progress > input[type='range']::-webkit-slider-thumb:active {
   background-image: -webkit-image-set(
-    url('../images/media/media_slider_thumb_down.png') 1x,
-    url('../images/media/2x/media_slider_thumb_down.png') 2x);
+    url(../images/media/media_slider_thumb_down.png) 1x,
+    url(../images/media/2x/media_slider_thumb_down.png) 2x);
 }
 
 .custom-slider.progress.disabled > input[type='range']::-webkit-slider-thumb {
@@ -344,84 +344,84 @@
 
 .media-button.sound[level='0'] > .normal {
   background-image: -webkit-image-set(
-    url('../images/media/media_sound_disabled.png') 1x,
-    url('../images/media/2x/media_sound_disabled.png') 2x);
+    url(../images/media/media_sound_disabled.png) 1x,
+    url(../images/media/2x/media_sound_disabled.png) 2x);
 }
 
 .media-button.sound[level='0'] > .hover {
   background-image: -webkit-image-set(
-    url('../images/media/media_sound_disabled_hover.png') 1x,
-    url('../images/media/2x/media_sound_disabled_hover.png') 2x);
+    url(../images/media/media_sound_disabled_hover.png) 1x,
+    url(../images/media/2x/media_sound_disabled_hover.png) 2x);
 }
 
 .media-button.sound[level='0'] > .active {
   background-image: -webkit-image-set(
-    url('../images/media/media_sound_disabled_down.png') 1x,
-    url('../images/media/2x/media_sound_disabled_down.png') 2x);
+    url(../images/media/media_sound_disabled_down.png) 1x,
+    url(../images/media/2x/media_sound_disabled_down.png) 2x);
 }
 
 
 .media-button.sound[level='1'] > .normal {
   background-image: -webkit-image-set(
-    url('../images/media/media_sound_level1.png') 1x,
-    url('../images/media/2x/media_sound_level1.png') 2x);
+    url(../images/media/media_sound_level1.png) 1x,
+    url(../images/media/2x/media_sound_level1.png) 2x);
 }
 
 .media-button.sound[level='1'] > .hover {
   background-image: -webkit-image-set(
-    url('../images/media/media_sound_level1_hover.png') 1x,
-    url('../images/media/2x/media_sound_level1_hover.png') 2x);
+    url(../images/media/media_sound_level1_hover.png) 1x,
+    url(../images/media/2x/media_sound_level1_hover.png) 2x);
 }
 
 .media-button.sound[level='1'] > .active {
   background-image: -webkit-image-set(
-    url('../images/media/media_sound_level1_down.png') 1x,
-    url('../images/media/2x/media_sound_level1_down.png') 2x);
+    url(../images/media/media_sound_level1_down.png) 1x,
+    url(../images/media/2x/media_sound_level1_down.png) 2x);
 }
 
 
 .media-button.sound[level='2'] > .normal {
   background-image: -webkit-image-set(
-    url('../images/media/media_sound_level2.png') 1x,
-    url('../images/media/2x/media_sound_level2.png') 2x);
+    url(../images/media/media_sound_level2.png) 1x,
+    url(../images/media/2x/media_sound_level2.png) 2x);
 }
 
 .media-button.sound[level='2'] > .hover {
   background-image: -webkit-image-set(
-    url('../images/media/media_sound_level2_hover.png') 1x,
-    url('../images/media/2x/media_sound_level2_hover.png') 2x);
+    url(../images/media/media_sound_level2_hover.png) 1x,
+    url(../images/media/2x/media_sound_level2_hover.png) 2x);
 }
 
 .media-button.sound[level='2'] > .active {
   background-image: -webkit-image-set(
-    url('../images/media/media_sound_level2_down.png') 1x,
-    url('../images/media/2x/media_sound_level2_down.png') 2x);
+    url(../images/media/media_sound_level2_down.png) 1x,
+    url(../images/media/2x/media_sound_level2_down.png) 2x);
 }
 
 
 .media-button.sound[level='3'] > .normal {
   background-image: -webkit-image-set(
-    url('../images/media/media_sound_full.png') 1x,
-    url('../images/media/2x/media_sound_full.png') 2x);
+    url(../images/media/media_sound_full.png) 1x,
+    url(../images/media/2x/media_sound_full.png) 2x);
 }
 
 .media-button.sound[level='3'] > .hover {
   background-image: -webkit-image-set(
-    url('../images/media/media_sound_full_hover.png') 1x,
-    url('../images/media/2x/media_sound_full_hover.png') 2x);
+    url(../images/media/media_sound_full_hover.png) 1x,
+    url(../images/media/2x/media_sound_full_hover.png) 2x);
 }
 
 .media-button.sound[level='3'] > .active {
   background-image: -webkit-image-set(
-    url('../images/media/media_sound_full_down.png') 1x,
-    url('../images/media/2x/media_sound_full_down.png') 2x);
+    url(../images/media/media_sound_full_down.png) 1x,
+    url(../images/media/2x/media_sound_full_down.png) 2x);
 }
 
 
 .media-button.sound > .disabled {
   background-image: -webkit-image-set(
-    url('../images/media/media_sound_full_disabled.png') 1x,
-    url('../images/media/2x/media_sound_full_disabled.png') 2x);
+    url(../images/media/media_sound_full_disabled.png) 1x,
+    url(../images/media/2x/media_sound_full_disabled.png) 2x);
 }
 
 /* Volume slider. */
@@ -434,21 +434,21 @@
 
 .custom-slider.volume > input[type='range']::-webkit-slider-thumb {
   background-image: -webkit-image-set(
-    url('../images/media/media_volume_slider_thumb.png') 1x,
-    url('../images/media/2x/media_volume_slider_thumb.png') 2x);
+    url(../images/media/media_volume_slider_thumb.png) 1x,
+    url(../images/media/2x/media_volume_slider_thumb.png) 2x);
   width: 20px;
 }
 
 .custom-slider.volume > input[type='range']::-webkit-slider-thumb:hover {
   background-image: -webkit-image-set(
-    url('../images/media/media_volume_slider_thumb_hover.png') 1x,
-    url('../images/media/2x/media_volume_slider_thumb_hover.png') 2x);
+    url(../images/media/media_volume_slider_thumb_hover.png) 1x,
+    url(../images/media/2x/media_volume_slider_thumb_hover.png) 2x);
 }
 
 .custom-slider.volume > input[type='range']::-webkit-slider-thumb:active {
   background-image: -webkit-image-set(
-    url('../images/media/media_volume_slider_thumb_down.png') 1x,
-    url('../images/media/2x/media_volume_slider_thumb_down.png') 2x);
+    url(../images/media/media_volume_slider_thumb_down.png) 1x,
+    url(../images/media/2x/media_volume_slider_thumb_down.png) 2x);
 }
 
 .custom-slider.volume.disabled > input[type='range']::-webkit-slider-thumb {
@@ -479,38 +479,38 @@
 
 .media-button.cast > .default.normal {
   background-image: -webkit-image-set(
-    url('../images/media/media_chromecast.png') 1x,
-    url('../images/media/2x/media_chromecast.png') 2x);
+    url(../images/media/media_chromecast.png) 1x,
+    url(../images/media/2x/media_chromecast.png) 2x);
 }
 
 .media-button.cast > .default.hover {
   background-image: -webkit-image-set(
-    url('../images/media/media_chromecast_hover.png') 1x,
-    url('../images/media/2x/media_chromecast_hover.png') 2x);
+    url(../images/media/media_chromecast_hover.png) 1x,
+    url(../images/media/2x/media_chromecast_hover.png) 2x);
 }
 
 .media-button.cast > .default.active {
   background-image: -webkit-image-set(
-    url('../images/media/media_chromecast_down.png') 1x,
-    url('../images/media/2x/media_chromecast_down.png') 2x);
+    url(../images/media/media_chromecast_down.png) 1x,
+    url(../images/media/2x/media_chromecast_down.png) 2x);
 }
 
 #video-player[casting] .media-button.cast > .default.normal {
   background-image: -webkit-image-set(
-    url('../images/media/media_chromecast_casting.png') 1x,
-    url('../images/media/2x/media_chromecast_casting.png') 2x);
+    url(../images/media/media_chromecast_casting.png) 1x,
+    url(../images/media/2x/media_chromecast_casting.png) 2x);
 }
 
 #video-player[casting] .media-button.cast > .default.hover {
   background-image: -webkit-image-set(
-    url('../images/media/media_chromecast_casting_hover.png') 1x,
-    url('../images/media/2x/media_chromecast_casting_hover.png') 2x);
+    url(../images/media/media_chromecast_casting_hover.png) 1x,
+    url(../images/media/2x/media_chromecast_casting_hover.png) 2x);
 }
 
 #video-player[casting] .media-button.cast > .default.active {
   background-image: -webkit-image-set(
-    url('../images/media/media_chromecast_casting_down.png') 1x,
-    url('../images/media/2x/media_chromecast_casting_down.png') 2x);
+    url(../images/media/media_chromecast_casting_down.png) 1x,
+    url(../images/media/2x/media_chromecast_casting_down.png) 2x);
 }
 
 .media-button.cast {
@@ -527,26 +527,26 @@
 
 .media-button.fullscreen > .normal {
   background-image: -webkit-image-set(
-    url('../images/media/media_fullscreen.png') 1x,
-    url('../images/media/2x/media_fullscreen.png') 2x);
+    url(../images/media/media_fullscreen.png) 1x,
+    url(../images/media/2x/media_fullscreen.png) 2x);
 }
 
 .media-button.fullscreen > .hover {
   background-image: -webkit-image-set(
-    url('../images/media/media_fullscreen_hover.png') 1x,
-    url('../images/media/2x/media_fullscreen_hover.png') 2x);
+    url(../images/media/media_fullscreen_hover.png) 1x,
+    url(../images/media/2x/media_fullscreen_hover.png) 2x);
 }
 
 .media-button.fullscreen > .active {
   background-image: -webkit-image-set(
-    url('../images/media/media_fullscreen_down.png') 1x,
-    url('../images/media/2x/media_fullscreen_down.png') 2x);
+    url(../images/media/media_fullscreen_down.png) 1x,
+    url(../images/media/2x/media_fullscreen_down.png) 2x);
 }
 
 .media-button.fullscreen > .disabled {
   background-image: -webkit-image-set(
-    url('../images/media/media_fullscreen_disabled.png') 1x,
-    url('../images/media/2x/media_fullscreen_disabled.png') 2x);
+    url(../images/media/media_fullscreen_disabled.png) 1x,
+    url(../images/media/2x/media_fullscreen_disabled.png) 2x);
 }
 
 .playback-state-icon {
@@ -628,13 +628,13 @@
 .playback-state-icon[state='play'] {
   -webkit-animation: blowup 500ms;
   background-image: -webkit-image-set(
-    url('../images/media/media_play.png') 1x,
-    url('../images/media/2x/media_play.png') 2x);
+    url(../images/media/media_play.png) 1x,
+    url(../images/media/2x/media_play.png) 2x);
 }
 
 .playback-state-icon[state='pause'] {
   -webkit-animation: blowup 500ms;
   background-image: -webkit-image-set(
-    url('../images/media/media_pause.png') 1x,
-    url('../images/media/2x/media_pause.png') 2x);
+    url(../images/media/media_pause.png) 1x,
+    url(../images/media/2x/media_pause.png) 2x);
 }
diff --git a/ui/file_manager/video_player/css/video_player.css b/ui/file_manager/video_player/css/video_player.css
index 4218aa7..fe78641 100644
--- a/ui/file_manager/video_player/css/video_player.css
+++ b/ui/file_manager/video_player/css/video_player.css
@@ -87,8 +87,8 @@ video {
 
 #cast-container > #cast-info {
   background-image: -webkit-image-set(
-      url('../images/100/cast_big.png') 1x,
-      url('../images/200/cast_big.png') 2x);
+      url(../images/100/cast_big.png) 1x,
+      url(../images/200/cast_big.png) 2x);
   background-position: 0 0;
   background-repeat: no-repeat;
   bottom: 70px;
@@ -162,8 +162,8 @@ video {
   -webkit-box-pack: center;
   background-color: rgba(24, 24, 24, 1);
   background-image: -webkit-image-set(
-      url('../images/100/error.png') 1x,
-      url('../images/200/error.png') 2x);
+      url(../images/100/error.png) 1x,
+      url(../images/200/error.png) 2x);
   background-position: 25px center;
   background-repeat: no-repeat;
   color: white;