Let Selection.deleteFromDocument not delete a character when the selection is a caret.

Source/core/page/DOMSelection.cpp

Index: Source/core/page/DOMSelection.cpp
diff --git a/Source/core/page/DOMSelection.cpp b/Source/core/page/DOMSelection.cpp
index 1765d5af0019a445fb79323891608bc2d91d4ff7..ebde68e61b0aabacef172ce9208df35978b90f7a 100644
--- a/Source/core/page/DOMSelection.cpp
+++ b/Source/core/page/DOMSelection.cpp
@@ -447,9 +447,6 @@ void DOMSelection::deleteFromDocument()
     if (selection.isNone())
         return;
 
-    if (isCollapsed())
-        selection.modify(FrameSelection::AlterationExtend, DirectionBackward, CharacterGranularity);
-
     RefPtrWillBeRawPtr<Range> selectedRange = selection.selection().toNormalizedRange();
     if (!selectedRange)
         return;