Improving direction-based selection strategy.

Source/core/editing/FrameSelection.cpp

Index: Source/core/editing/FrameSelection.cpp
diff --git a/Source/core/editing/FrameSelection.cpp b/Source/core/editing/FrameSelection.cpp
index 822ad5250f7e7486c10ec1206bff99344fd20bcc..73c20cfc91b77b59650887a48d100b532ab36c7a 100644
--- a/Source/core/editing/FrameSelection.cpp
+++ b/Source/core/editing/FrameSelection.cpp
@@ -1938,12 +1938,12 @@ GranularityStrategy* FrameSelection::granularityStrategy()
     return m_granularityStrategy.get();
 }
 
-void FrameSelection::moveRangeSelectionExtent(const VisiblePosition& extentPosition)
+void FrameSelection::moveRangeSelectionExtent(const IntPoint& framePoint)
 {
-    if (isNone() || m_selection.visibleBase() == extentPosition)
+    if (isNone())
         return;
 
-    VisibleSelection newSelection = granularityStrategy()->updateExtent(extentPosition, selection());
+    VisibleSelection newSelection = granularityStrategy()->updateExtent(framePoint, m_frame);
     setSelection(
         newSelection,
         FrameSelection::CloseTyping | FrameSelection::ClearTypingStyle | FrameSelection::DoNotClearStrategy | UserTriggered,