URL.search should return the set value via setSearch

third_party/WebKit/LayoutTests/fast/domurl/url-search.html

Index: third_party/WebKit/LayoutTests/fast/domurl/url-search.html
diff --git a/third_party/WebKit/LayoutTests/fast/domurl/url-search.html b/third_party/WebKit/LayoutTests/fast/domurl/url-search.html
index 41d471d2d8a4997ea5deb89a960c82fe2e22d147..6695359959ef6a77cade03d7dd619b487552f184 100644
--- a/third_party/WebKit/LayoutTests/fast/domurl/url-search.html
+++ b/third_party/WebKit/LayoutTests/fast/domurl/url-search.html
@@ -27,6 +27,9 @@ test(function() {
     url.search = '?b';
     assert_equals(url.search, '?b');
 
+    url.search = '??b';
+    assert_equals(url.search, '??b');
+
     url.search = 'a#b';
     assert_equals(url.search, '?a%23b');