Route selection bounds updates through WebLayerTreeView

public/platform/WebLayerTreeView.h

Index: public/platform/WebLayerTreeView.h
diff --git a/public/platform/WebLayerTreeView.h b/public/platform/WebLayerTreeView.h
index 134201641833257cbdaed29ace3b3bf55091f46e..2293fdfac3b3f2c758c3f7dc94ff84c697e631db 100644
--- a/public/platform/WebLayerTreeView.h
+++ b/public/platform/WebLayerTreeView.h
@@ -42,6 +42,7 @@ class WebLayer;
 struct WebPoint;
 struct WebRect;
 struct WebRenderingStats;
+struct WebSelection;
 
 class WebLayerTreeView {
 public:
@@ -125,6 +126,10 @@ public:
         const WebLayer* outerViewportScrollLayer) { }
     virtual void clearViewportLayers() { }
 
+    // Used to update the active selection region.
+    virtual void registerSelection(const WebSelection& selection) { }
+    virtual void clearSelection() { }
+
     // Debugging / dangerous ---------------------------------------------
 
     // Toggles the FPS counter in the HUD layer