Rework compositor touch hit testing

Source/core/rendering/svg/RenderSVGModelObject.cpp

Index: Source/core/rendering/svg/RenderSVGModelObject.cpp
diff --git a/Source/core/rendering/svg/RenderSVGModelObject.cpp b/Source/core/rendering/svg/RenderSVGModelObject.cpp
index 2939781f49c4d4a20c9ecca9a8cac74a71681d4f..f3e5ca870c2e29576bb33cf74d21fe33bef1ff79 100644
--- a/Source/core/rendering/svg/RenderSVGModelObject.cpp
+++ b/Source/core/rendering/svg/RenderSVGModelObject.cpp
@@ -33,6 +33,7 @@
 #include "core/rendering/svg/RenderSVGModelObject.h"
 
 #include "SVGNames.h"
+#include "core/rendering/svg/RenderSVGRoot.h"
 #include "core/rendering/svg/SVGResourcesCache.h"
 #include "core/svg/SVGStyledElement.h"
 
@@ -94,6 +95,17 @@ void RenderSVGModelObject::willBeDestroyed()
     RenderObject::willBeDestroyed();
 }
 
+void RenderSVGModelObject::computeLayerHitTestRects(LayerHitTestRects& rects) const
+{
+    // Using just the rect for the SVGRoot is good enough for now.
+    SVGRenderSupport::findTreeRootObject(this)->computeLayerHitTestRects(rects);
+}
+
+void RenderSVGModelObject::addLayerHitTestRects(LayerHitTestRects&, const RenderLayer* currentLayer, const LayoutPoint& layerOffset) const
+{
+    // We don't walk into SVG trees at all - just report their container.
+}
+
 void RenderSVGModelObject::styleWillChange(StyleDifference diff, const RenderStyle* newStyle)
 {
     if (diff == StyleDifferenceLayout) {