MD Downloads: fix search spinner when terms are the same

chrome/browser/resources/md_downloads/vulcanized.html

Index: chrome/browser/resources/md_downloads/vulcanized.html
diff --git a/chrome/browser/resources/md_downloads/vulcanized.html b/chrome/browser/resources/md_downloads/vulcanized.html
index a16b2c99b0b14c2d26eae0677c4b9ba1c8a3ceb3..d03743a69f6a0a078cb461f49d70e3a0508d6b19 100644
--- a/chrome/browser/resources/md_downloads/vulcanized.html
+++ b/chrome/browser/resources/md_downloads/vulcanized.html
@@ -2854,17 +2854,10 @@ paper-button {
         width: 100%;
       }
 
-      /*
-       * Margin needs to be animated to prevent jumping around during
-       * opening/closing. -webkit-margin-start is not animatable, so we have to
-       * use regular margin-left/right instead.
-       */
-      :host-context([dir=ltr]):host([narrow][showing-search]) #icon {
-        margin-left: 18px;
-      }
-
-      :host-context([dir=rtl]):host([narrow][showing-search]) #icon {
-        margin-right: 18px;
+      :host-context([dir=ltr]):host([narrow][showing-search]) #icon,
+      :host-context([dir=ltr]):host([narrow][showing-search])
+          paper-spinner-lite {
+        -webkit-margin-start: 18px;
       }
     </style>
     <paper-spinner-lite active="[[isSpinnerShown_(spinnerActive, showingSearch)]]">