WebFrame::selectRange and moveCaret should behave like mouse selection

Source/core/editing/VisibleSelection.h

Index: Source/core/editing/VisibleSelection.h
diff --git a/Source/core/editing/VisibleSelection.h b/Source/core/editing/VisibleSelection.h
index 6f25cac2a6bd09c5cfa06bf3a1c835c131997efe..bb7c52841d3f4cee442307b7847f753fabcd83d9 100644
--- a/Source/core/editing/VisibleSelection.h
+++ b/Source/core/editing/VisibleSelection.h
@@ -31,6 +31,7 @@
 
 namespace WebCore {
 
+class LayoutPoint;
 class Position;
 
 const EAffinity SEL_DEFAULT_AFFINITY = DOWNSTREAM;
@@ -105,6 +106,9 @@ public:
     // ShadowRoot node for new shadow trees, or 0 for non-shadow trees.
     Node* nonBoundaryShadowTreeRootNode() const;
 
+    VisiblePosition visiblePositionRespectingEditingBoundary(const LayoutPoint& localPoint, Node* targetNode) const;
+
+
 #ifndef NDEBUG
     void debugPosition() const;
     void formatForDebugger(char* buffer, unsigned length) const;