Experimental viewport meta tag support for desktop, Blink-side.

Source/core/dom/Document.cpp

Index: Source/core/dom/Document.cpp
diff --git a/Source/core/dom/Document.cpp b/Source/core/dom/Document.cpp
index 59dae55eb37d3d7b040f2a675091abf29a3f955a..ae6a51fb09c01cb9016c0334a9474dd018d4662a 100644
--- a/Source/core/dom/Document.cpp
+++ b/Source/core/dom/Document.cpp
@@ -2941,6 +2941,9 @@ bool Document::shouldMergeWithLegacyDescription(ViewportDescription::Type origin
 void Document::setViewportDescription(const ViewportDescription& viewportDescription)
 {
     if (viewportDescription.isLegacyViewportType()) {
+        if (settings() && !settings()->viewportMetaEnabled())
+            return;
+
         m_legacyViewportDescription = viewportDescription;
 
         // When no author style for @viewport is present, and a meta tag for defining