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..b89781c3aa1d199e22ae0d29241e8b9aecf53fc3 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;
 
@@ -408,12 +405,13 @@ 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);
+            if (!document().viewportDefaultMinWidth().isAuto())
+                descriptionFromLegacyTag.maxWidth = document().viewportDefaultMinWidth();

[apavlov, 2014/03/31 16:47:19]

This is slightly confusing (foo.maxWidth = bar.minWidth()). Do you mind adding a
short comment here?

[kenneth.r.christiansen, 2014/03/31 20:37:09]

Done.

+            else
+                descriptionFromLegacyTag.maxWidth = Length(ExtendToZoom);
         } else if (descriptionFromLegacyTag.maxHeight.isAuto()) {
             descriptionFromLegacyTag.minWidth = Length(ExtendToZoom);
             descriptionFromLegacyTag.maxWidth = Length(ExtendToZoom);