Allow parsing of custom window features, such as 'moo=foo'.

Source/core/page/WindowFeatures.cpp

Index: Source/core/page/WindowFeatures.cpp
diff --git a/Source/core/page/WindowFeatures.cpp b/Source/core/page/WindowFeatures.cpp
index 2ac15dc5787f2a2d6b7d95bde027372891fe7903..6a26e050141ec1a22f24d713453442182eab4afc 100644
--- a/Source/core/page/WindowFeatures.cpp
+++ b/Source/core/page/WindowFeatures.cpp
@@ -156,8 +156,15 @@ void WindowFeatures::setWindowFeature(const String& keyString, const String& val
         fullscreen = value;
     else if (keyString == "scrollbars")
         scrollbarsVisible = value;
-    else if (value == 1)
-        additionalFeatures.append(keyString);
+    else {
+        // We're dealing with an unknown key, so just pass it on for processing
+        // at a later time.
+        String keyValueStr = keyString;
+        if (!valueString.isEmpty())
+            keyValueStr.append("=" + valueString);
+
+        additionalFeatures.append(keyValueStr);
+    }
 }
 
 WindowFeatures::WindowFeatures(const String& dialogFeaturesString, const FloatRect& screenAvailableRect)