Move code from StyleResolver to ViewportStyleResolver.

Source/core/page/Page.cpp

Index: Source/core/page/Page.cpp
diff --git a/Source/core/page/Page.cpp b/Source/core/page/Page.cpp
index afae84c36062a76c4e48a2a9c8541726770bbeb5..3f27bd50248008af9a0301c357a945318d8a4105 100644
--- a/Source/core/page/Page.cpp
+++ b/Source/core/page/Page.cpp
@@ -20,6 +20,7 @@
 #include "config.h"
 #include "core/page/Page.h"
 
+#include "core/css/resolver/ViewportStyleResolver.h"
 #include "core/dom/ClientRectList.h"
 #include "core/dom/DocumentMarkerController.h"
 #include "core/dom/StyleEngine.h"
@@ -515,6 +516,17 @@ void Page::settingsChanged(SettingsDelegate::ChangeType changeType)
         if (!mainFrame() || !mainFrame()->isLocalFrame())
             break;
         deprecatedLocalMainFrame()->document()->axObjectCacheOwner().clearAXObjectCache();
+        break;
+    case SettingsDelegate::ViewportRuleChange:
+        {
+            if (!mainFrame() || !mainFrame()->isLocalFrame())
+                break;
+            Document* doc = toLocalFrame(mainFrame())->document();
+            if (!doc || !doc->styleResolver())
+                break;
+            doc->styleResolver()->viewportStyleResolver()->collectViewportRules();
+        }
+        break;
     }
 }