Reland: Made content editables report the caret and text selection by treating them as text controls

Source/modules/accessibility/AXObject.h

Index: Source/modules/accessibility/AXObject.h
diff --git a/Source/modules/accessibility/AXObject.h b/Source/modules/accessibility/AXObject.h
index 9f5ad675b2c273a5bf1178d2f5ae3dff41bf7667..1efb0dc1f457e75124ffe26a5626afda05fe9d62 100644
--- a/Source/modules/accessibility/AXObject.h
+++ b/Source/modules/accessibility/AXObject.h
@@ -409,8 +409,8 @@ public:
     bool isTabItem() const { return roleValue() == TabRole; }
     virtual bool isTableCell() const { return false; }
     virtual bool isTableRow() const { return false; }
+    virtual bool isTextControl() const { return false; }
     virtual bool isTableCol() const { return false; }
-    bool isTextControl() const;
     bool isTree() const { return roleValue() == TreeRole; }
     bool isTreeItem() const { return roleValue() == TreeItemRole; }
     bool isWebArea() const { return roleValue() == WebAreaRole; }
@@ -690,7 +690,6 @@ protected:
 
     AccessibilityRole buttonRoleType() const;
 
-    bool allowsTextRanges() const { return isTextControl(); }
     unsigned getLengthForTextRange() const { return text().length(); }
 
     bool m_detached;