Adds animation on a hovered directory/volume when dragging files in Files.app

chrome/browser/resources/file_manager/css/file_manager.css

Index: chrome/browser/resources/file_manager/css/file_manager.css
diff --git a/chrome/browser/resources/file_manager/css/file_manager.css b/chrome/browser/resources/file_manager/css/file_manager.css
index c4d6c4543fb56877a8911a7debcbce32950fb5af..8a0fc401e9ff4550b1ecb6a235fcc36fec42ed6e 100644
--- a/chrome/browser/resources/file_manager/css/file_manager.css
+++ b/chrome/browser/resources/file_manager/css/file_manager.css
@@ -684,6 +684,18 @@ body[type='full-page'] list .filename-label > :hover,
   text-decoration: underline;
 }
 
+.breadcrumb-path.accepts {
+  -webkit-animation: acceptsBlinkText 200ms linear 1s 3;
+}
+
+@-webkit-keyframes acceptsBlinkText {
+  0% {
+    color: white;
+  }
+  50% {
+  }
+}
+
 .img-container > img {
   -webkit-user-drag: none;
   position: absolute;
@@ -848,6 +860,20 @@ body[type='full-page'] .thumbnail-grid .thumbnail-bottom {
   border-color: transparent;
 }
 
+#roots-list > .accepts,
+#list-container list > .accepts,
+#list-container grid > .accepts {
+  -webkit-animation: acceptsBlink 200ms linear 1s 3;
+}
+
+@-webkit-keyframes acceptsBlink {
+  0% {
+    background-color: transparent;
+  }
+  50% {
+  }
+}
+
 .table-row-cell .filename-label,
 .thumbnail-item .filename-label,
 /* Show ellipsis in cells. The name column has different structure and overrides