matchMedia('(display-mode: <notValid>)').matches should not evaluate true

third_party/WebKit/Source/core/css/MediaQueryEvaluator.cpp

Index: third_party/WebKit/Source/core/css/MediaQueryEvaluator.cpp
diff --git a/third_party/WebKit/Source/core/css/MediaQueryEvaluator.cpp b/third_party/WebKit/Source/core/css/MediaQueryEvaluator.cpp
index b845244f5ca3f925222dc2e54b354052935fe612..d9a6db185134bde850ef0deb1d3d2e36bd580670 100644
--- a/third_party/WebKit/Source/core/css/MediaQueryEvaluator.cpp
+++ b/third_party/WebKit/Source/core/css/MediaQueryEvaluator.cpp
@@ -221,9 +221,14 @@ static bool monochromeMediaFeatureEval(const MediaQueryExpValue& value, MediaFea
 
 static bool displayModeMediaFeatureEval(const MediaQueryExpValue& value, MediaFeaturePrefix, const MediaValues& mediaValues)
 {
-    if (!value.isID)
+    // isValid() is false if there is no parameter. Without parameter we should return true to indicate that
+    // displayModeMediaFeature is enabled in the browser.
+    if (!value.isValid())
         return true;
 
+    if (!value.isID)
+        return false;
+
     WebDisplayMode mode = mediaValues.displayMode();
     switch (value.id) {
     case CSSValueFullscreen: