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 f7dc5c041d91a896b180cbc31c47a3c389e76f2e..b8f0049bb20c97bc601850201760c21ceed7ee33 100644
--- a/Source/core/dom/Document.cpp
+++ b/Source/core/dom/Document.cpp
@@ -2928,6 +2928,9 @@ 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