Read the default min-width value from the UA style sheets

Source/core/html/HTMLMetaElement-in.cpp

Index: Source/core/html/HTMLMetaElement-in.cpp
diff --git a/Source/core/html/HTMLMetaElement-in.cpp b/Source/core/html/HTMLMetaElement-in.cpp
index d63713d0ee7dffdbb1dfc52cb83bfdb52c03fc16..9575a9142c93fc0e3297bdc9cd45da0f89b0290b 100644
--- a/Source/core/html/HTMLMetaElement-in.cpp
+++ b/Source/core/html/HTMLMetaElement-in.cpp
@@ -388,9 +388,6 @@ void HTMLMetaElement::processViewportContentAttribute(const String& content, Vie
 {
     ASSERT(!content.isNull());
 
-    if (!document().settings())
-        return;
-
     if (!document().shouldOverrideLegacyDescription(origin))
         return;
 
@@ -408,18 +405,6 @@ void HTMLMetaElement::processViewportContentAttribute(const String& content, Vie
         descriptionFromLegacyTag.minZoom = std::min(descriptionFromLegacyTag.minZoom, float(5));
     }
 
-    const Settings* settings = document().settings();
-
-    if (descriptionFromLegacyTag.maxWidth.isAuto()) {
-        if (descriptionFromLegacyTag.zoom == ViewportDescription::ValueAuto) {
-            descriptionFromLegacyTag.minWidth = Length(ExtendToZoom);
-            descriptionFromLegacyTag.maxWidth = Length(settings->layoutFallbackWidth(), Fixed);
-        } else if (descriptionFromLegacyTag.maxHeight.isAuto()) {
-            descriptionFromLegacyTag.minWidth = Length(ExtendToZoom);
-            descriptionFromLegacyTag.maxWidth = Length(ExtendToZoom);
-        }
-    }
-
     document().setViewportDescription(descriptionFromLegacyTag);
 }