[Media Router WebUI] Fix search input padding to match redlines.

chrome/browser/resources/media_router/elements/media_router_container/media_router_container.css

Index: chrome/browser/resources/media_router/elements/media_router_container/media_router_container.css
diff --git a/chrome/browser/resources/media_router/elements/media_router_container/media_router_container.css b/chrome/browser/resources/media_router/elements/media_router_container/media_router_container.css
index 10e0f312260d09ed00e3c8110fc6af1884135990..dc62e0efb059569b74ab8f4e067d49c9b170272a 100644
--- a/chrome/browser/resources/media_router/elements/media_router_container/media_router_container.css
+++ b/chrome/browser/resources/media_router/elements/media_router_container/media_router_container.css
@@ -175,12 +175,20 @@ paper-menu {
   /* TODO(crbug/589697): Handle overflow of very long domain names. */
 }
 
+#sink-list {
+  padding-bottom: 0;
+}
+
 .sink-name {
   min-width: 10%;
   overflow: hidden;
   text-overflow: ellipsis;
 }
 
+#sink-search.bottom {
+  padding-bottom: 16px;
+}
+
 /* Separate icon class is a consequence of box-sizing: border-box set by
  * paper-icon-button. This should achieve the same dimensions as .sink-icon.
  */