setViewportEnabled on InternalSettings

Source/core/page/Settings.h

Index: Source/core/page/Settings.h
diff --git a/Source/core/page/Settings.h b/Source/core/page/Settings.h
index b8ad9e7d52820fb3c73a016a66e7bd861b039f6b..9fe3bfa6d61666771c3ba92e53a21f07be7ad60e 100644
--- a/Source/core/page/Settings.h
+++ b/Source/core/page/Settings.h
@@ -151,6 +151,9 @@ public:
     void setOpenGLMultisamplingEnabled(bool flag);
     bool openGLMultisamplingEnabled();
 
+    void setViewportEnabled(bool);
+    bool viewportEnabled() const { return m_viewportEnabled; }
+
     // FIXME: This is a temporary flag and should be removed once accelerated
     // overflow scroll is ready (crbug.com/254111).
     void setCompositorDrivenAcceleratedScrollingEnabled(bool enabled) { m_compositorDrivenAcceleratedScrollingEnabled = enabled; }
@@ -189,6 +192,7 @@ private:
 
     bool m_touchEventEmulationEnabled : 1;
     bool m_openGLMultisamplingEnabled : 1;
+    bool m_viewportEnabled : 1;
 
     // FIXME: This is a temporary flag and should be removed once accelerated
     // overflow scroll is ready (crbug.com/254111).