Enabled using viewport on desktop browsers behind experimental flag

public/webview/WebSettings.h

Index: public/webview/WebSettings.h
diff --git a/public/webview/WebSettings.h b/public/webview/WebSettings.h
index 6854fb7194c762132426bad4d9cbc6acc2e6d8a7..8aaef9c0c52b628860013cdcffad9e7226053bfc 100644
--- a/public/webview/WebSettings.h
+++ b/public/webview/WebSettings.h
@@ -52,6 +52,8 @@ public:
         EditingBehaviorAndroid
     };
 
+    virtual bool layoutFallbackWidthIsWindowWidth() const = 0;
+    virtual bool resizeAffectsLayoutWidth() const = 0;
     virtual bool scrollAnimatorEnabled() const = 0;
     virtual bool touchEditingEnabled() const = 0;
     virtual bool viewportEnabled() const = 0;
@@ -102,6 +104,7 @@ public:
     virtual void setCSSStickyPositionEnabled(bool) = 0;
     virtual void setExperimentalWebGLEnabled(bool) = 0;
     virtual void setExperimentalWebSocketEnabled(bool) = 0;
+    virtual void setResizeAffectsLayoutWidth(bool) = 0;
     virtual void setPinchVirtualViewportEnabled(bool) = 0;
     virtual void setFantasyFontFamily(const WebString&, UScriptCode = USCRIPT_COMMON) = 0;
     virtual void setFixedFontFamily(const WebString&, UScriptCode = USCRIPT_COMMON) = 0;
@@ -117,6 +120,7 @@ public:
     virtual void setJavaScriptCanOpenWindowsAutomatically(bool) = 0;
     virtual void setJavaScriptEnabled(bool) = 0;
     virtual void setLayoutFallbackWidth(int) = 0;
+    virtual void setLayoutFallbackWidthIsWindowWidth(bool) = 0;
     virtual void setLoadsImagesAutomatically(bool) = 0;
     virtual void setLoadWithOverviewMode(bool) = 0;
     virtual void setLocalStorageEnabled(bool) = 0;