Make it possible to set the display mode from the WebView API

Source/core/css/MediaValuesCached.h

Index: Source/core/css/MediaValuesCached.h
diff --git a/Source/core/css/MediaValuesCached.h b/Source/core/css/MediaValuesCached.h
index 62d9b0f48da82e222db0bfbddfa773c005866f7f..4b94f9ba1c8694f309e67a69ccef233e0a083a14 100644
--- a/Source/core/css/MediaValuesCached.h
+++ b/Source/core/css/MediaValuesCached.h
@@ -28,7 +28,7 @@ public:
         bool threeDEnabled;
         bool strictMode;
         String mediaType;
-        DisplayMode displayMode;
+        WebDisplayMode displayMode;
 
         MediaValuesCachedData()
             : viewportWidth(0)
@@ -45,7 +45,7 @@ public:
             , defaultFontSize(16)
             , threeDEnabled(false)
             , strictMode(true)
-            , displayMode(DisplayModeBrowser)
+            , displayMode(WebDisplayModeBrowser)
         {
         }
     };
@@ -75,7 +75,7 @@ public:
     virtual Document* document() const override;
     virtual bool hasValues() const override;
     virtual const String mediaType() const override;
-    virtual DisplayMode displayMode() const override;
+    virtual WebDisplayMode displayMode() const override;
 
 protected:
     MediaValuesCached();