Index: src/wp-admin/css/media.css
===================================================================
--- src/wp-admin/css/media.css	(revision 52164)
+++ src/wp-admin/css/media.css	(working copy)
@@ -507,24 +507,6 @@
 	background: none;
 }

-.upload-php .mode-grid .media-sidebar .media-uploader-status .upload-dismiss-errors {
-	top: -10px;
-	right: -14px;
-	padding: 10px;
-}
-
-.upload-php .mode-grid .media-sidebar .media-uploader-status .upload-dismiss-errors:before {
-	content: "\f153";
-	display: block;
-	font: normal 16px/1 dashicons;
-	color: #787c82;
-}
-
-.upload-php .mode-grid .media-sidebar .media-uploader-status .upload-dismiss-errors:focus:before,
-.upload-php .mode-grid .media-sidebar .media-uploader-status .upload-dismiss-errors:hover:before {
-	color: #d63638;
-}
-
 .upload-php .mode-grid .media-sidebar .media-uploader-status.errors h2 {
 	display: none;
 }
Index: src/wp-includes/css/media-views.css
===================================================================
--- src/wp-includes/css/media-views.css	(revision 52164)
+++ src/wp-includes/css/media-views.css	(working copy)
@@ -1437,36 +1437,10 @@
 }

 .media-uploader-status .upload-dismiss-errors {
-	position: absolute;
-	top: -3px;
-	right: -5px;
-	padding: 5px;
-	border-radius: 50%;
 	transition: none;
 	text-decoration: none;
 }

-.uploader-inline .media-uploader-status .upload-dismiss-errors {
-	top: 2px;
-	right: 2px;
-}
-
-.media-uploader-status .upload-dismiss-errors::before {
-	content: "\f153";
-	display: block;
-	font: normal 16px/1 dashicons;
-	color: #787c82;
-}
-
-.uploader-inline .errors.media-uploader-status .upload-dismiss-errors::before {
-	color: #646970;
-}
-
-.errors.media-uploader-status .upload-dismiss-errors:hover::before,
-.errors.media-uploader-status .upload-dismiss-errors:focus::before {
-	color: #d63638;
-}
-
 .upload-errors .upload-error {
 	padding: 12px;
 	margin-bottom: 12px;
Index: src/wp-includes/media-template.php
===================================================================
--- src/wp-includes/media-template.php	(revision 52164)
+++ src/wp-includes/media-template.php	(working copy)
@@ -323,7 +323,6 @@
 	<?php // Template for the uploading status UI. ?>
 	<script type="text/html" id="tmpl-uploader-status">
 		<h2><?php _e( 'Uploading' ); ?></h2>
-		<button type="button" class="button-link upload-dismiss-errors"><span class="screen-reader-text"><?php _e( 'Dismiss Errors' ); ?></span></button>

 		<div class="media-progress-bar"><div></div></div>
 		<div class="upload-details">
@@ -334,6 +333,7 @@
 			<span class="upload-filename"></span>
 		</div>
 		<div class="upload-errors"></div>
+		<button type="button" class="upload-dismiss-errors"><?php _e( 'Dismiss errors' ); ?></button>
 	</script>

 	<?php // Template for the uploading status errors. ?>