Emit dummy display item when recorded picture is empty

Source/platform/graphics/paint/DisplayItem.cpp

Index: Source/platform/graphics/paint/DisplayItem.cpp
diff --git a/Source/platform/graphics/paint/DisplayItem.cpp b/Source/platform/graphics/paint/DisplayItem.cpp
index cd1d1516b233c900aa2f58ff9ab27050fd9654fc..e488d47bcf5963f95c44dbff22c48101a13a1da9 100644
--- a/Source/platform/graphics/paint/DisplayItem.cpp
+++ b/Source/platform/graphics/paint/DisplayItem.cpp
@@ -74,13 +74,14 @@ WTF::String DisplayItem::asDebugString() const
 
 void DisplayItem::dumpPropertiesAsDebugString(WTF::StringBuilder& stringBuilder) const
 {
+    stringBuilder.append("name: \"");
+    stringBuilder.append(name());
+    stringBuilder.append("\", ");
     if (!clientDebugString().isEmpty()) {
         stringBuilder.append(clientDebugString());
         stringBuilder.append(", ");
     }
     stringBuilder.append("type: \"");
-    if (isCached())
-        stringBuilder.append("Cached-");
     stringBuilder.append(typeAsDebugString(type()));
     stringBuilder.append('"');
 }