CANCEL: Make Document::caretRangeFromPoint() to work with :before style

Source/core/dom/Document.cpp

Index: Source/core/dom/Document.cpp
diff --git a/Source/core/dom/Document.cpp b/Source/core/dom/Document.cpp
index a38c6e40745dbc4d743a981594dc5b5e3409ec02..6f4aefc133ed7ae3ae92a761b4f49eff8a25d05e 100644
--- a/Source/core/dom/Document.cpp
+++ b/Source/core/dom/Document.cpp
@@ -1193,12 +1193,14 @@ PassRefPtr<Range> Document::caretRangeFromPoint(int x, int y)
 {
     if (!renderView())
         return 0;
-    LayoutPoint localPoint;
-    RenderObject* renderer = rendererFromPoint(this, x, y, &localPoint);
+    HitTestResult result = hitTestInDocument(*this, x, y);
+    RenderObject* renderer = result.renderer();
     if (!renderer)
         return 0;
 
     Node* node = renderer->node();
+    if (node->isPseudoElement())
+        return 0;
     Node* shadowAncestorNode = ancestorInThisScope(node);
     if (shadowAncestorNode != node) {
         unsigned offset = shadowAncestorNode->nodeIndex();
@@ -1206,7 +1208,7 @@ PassRefPtr<Range> Document::caretRangeFromPoint(int x, int y)
         return Range::create(*this, container, offset, container, offset);
     }
 
-    PositionWithAffinity positionWithAffinity = renderer->positionForPoint(localPoint);
+    PositionWithAffinity positionWithAffinity = result.position();
     if (positionWithAffinity.position().isNull())
         return 0;