[css-conditional] CSS.supports with one string should accept paren-less declaration.

third_party/WebKit/Source/core/editing/iterators/TextIteratorTest.cpp

Index: third_party/WebKit/Source/core/editing/iterators/TextIteratorTest.cpp
diff --git a/third_party/WebKit/Source/core/editing/iterators/TextIteratorTest.cpp b/third_party/WebKit/Source/core/editing/iterators/TextIteratorTest.cpp
index 357042e7ddeaaabf824f137b3173099da0551836..93eae7b806730ca98630dfc82b81aff883031f53 100644
--- a/third_party/WebKit/Source/core/editing/iterators/TextIteratorTest.cpp
+++ b/third_party/WebKit/Source/core/editing/iterators/TextIteratorTest.cpp
@@ -934,4 +934,12 @@ TEST_F(TextIteratorTest, StartAtRemainingTextInPre) {
   EXPECT_EQ("xyz", String(buffer.Data()));
 }
 
+TEST_F(TextIteratorTest, VisitsDisplayContentsChildren) {
+  SetBodyContent(
+      "<p>Hello, \ntext</p><p style='display: contents'>iterator.</p>");
+
+  EXPECT_EQ("[Hello, ][text][iterator.]", Iterate<DOMTree>());
+  EXPECT_EQ("[Hello, ][text][iterator.]", Iterate<FlatTree>());
+}
+
 }  // namespace blink