Route selection bounds updates through WebLayerTreeView

Source/web/WebViewImpl.h

Index: Source/web/WebViewImpl.h
diff --git a/Source/web/WebViewImpl.h b/Source/web/WebViewImpl.h
index 6bed8b9669937015af72b398924f1ef8d0a064c8..159a49c3cb62375ed9f2c236ea3120641d4995b5 100644
--- a/Source/web/WebViewImpl.h
+++ b/Source/web/WebViewImpl.h
@@ -77,6 +77,8 @@ class WebPagePopupImpl;
 class WebPlugin;
 class WebSettingsImpl;
 
+struct WebSelectionBound;
+
 class WebViewImpl FINAL : public WebView
     , public RefCounted<WebViewImpl>
     , public WebGestureCurveTarget
@@ -447,6 +449,7 @@ public:
     void exitFullScreenForElement(Element*);
 
     void clearCompositedSelectionBounds();
+    void updateCompositedSelectionBounds(const WebSelectionBound& anchor, const WebSelectionBound& focus);
 
     // Exposed for the purpose of overriding device metrics.
     void sendResizeEventAndRepaint();