Make first-letter style to work with editing

Source/core/accessibility/AccessibilityObject.cpp

Index: Source/core/accessibility/AccessibilityObject.cpp
diff --git a/Source/core/accessibility/AccessibilityObject.cpp b/Source/core/accessibility/AccessibilityObject.cpp
index 4ca03134b955dd249dd9e4a05c5bf6c3a5f6433d..b67d635e6511147d17ecf415617e0358ee1c4b34 100644
--- a/Source/core/accessibility/AccessibilityObject.cpp
+++ b/Source/core/accessibility/AccessibilityObject.cpp
@@ -816,7 +816,7 @@ void AccessibilityObject::selectionChanged()
 
 static VisiblePosition startOfStyleRange(const VisiblePosition& visiblePos)
 {
-    RenderObject* renderer = visiblePos.deepEquivalent().deprecatedNode()->renderer();
+    RenderObject* renderer = visiblePos.deepEquivalent().renderer();
     RenderObject* startRenderer = renderer;
     RenderStyle* style = renderer->style();
 
@@ -839,7 +839,7 @@ static VisiblePosition startOfStyleRange(const VisiblePosition& visiblePos)
 
 static VisiblePosition endOfStyleRange(const VisiblePosition& visiblePos)
 {
-    RenderObject* renderer = visiblePos.deepEquivalent().deprecatedNode()->renderer();
+    RenderObject* renderer = visiblePos.deepEquivalent().renderer();
     RenderObject* endRenderer = renderer;
     RenderStyle* style = renderer->style();