[epiphany/mcatanzaro/overview-placeholders: 2/2] overview.js: Fix setThumbnailPath

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 76a0b36b22ee5e282b62ff5dad2967f53b6a3f60
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Thu Jul 11 20:16:39 2019 -0500

    overview.js: Fix setThumbnailPath
    
    I don't know JavaScript well enough to know why this doesn't work, but
    it doesn't work.

 embed/web-process-extension/resources/js/overview.js | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/embed/web-process-extension/resources/js/overview.js 
b/embed/web-process-extension/resources/js/overview.js
index 797b757fa..5334de2ef 100644
--- a/embed/web-process-extension/resources/js/overview.js
+++ b/embed/web-process-extension/resources/js/overview.js
@@ -237,10 +237,11 @@ Ephy.Overview.Item = class OverviewItem
     setThumbnailPath(path)
     {
         if (path) {
-            this._thumbnail.style.background = 'url(file://' + path + '); background-size: 100%';
+            this._thumbnail.style.backgroundImage = 'url(file://' + path + ')';
+            this._thumbnail.style.backgroundSize = '100%';
+        } else {
+            this._thumbnail.style.backgroundImage = '';
         }
-        else
-            this._thumbnail.style.background = null;
     }
 
     detachFromParent()