Introduce enum class TextAffinity as replacement of enum EAffinity

Source/core/editing/FrameSelection.h

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 85 matching lines @@
     Element* rootEditableElement() const { return m_selection.rootEditableElement(); }
     Element* rootEditableElementOrDocumentElement() const;
     ContainerNode* rootEditableElementOrTreeScopeRootNode() const;
 
     bool hasEditableStyle() const { return m_selection.hasEditableStyle(); }
     bool isContentEditable() const { return m_selection.isContentEditable(); }
     bool isContentRichlyEditable() const { return m_selection.isContentRichlyEditable(); }
 
     void moveTo(const VisiblePosition&, EUserTriggered = NotUserTriggered, CursorAlignOnScroll = AlignCursorOnScrollIfNeeded);
     void moveTo(const VisiblePosition&, const VisiblePosition&, EUserTriggered = NotUserTriggered);
-    void moveTo(const Position&, EAffinity, EUserTriggered = NotUserTriggered);
+    void moveTo(const Position&, TextAffinity, EUserTriggered = NotUserTriggered);
 
     const VisibleSelection& selection() const { return m_selection; }
     void setSelection(const VisibleSelection&, SetSelectionOptions = CloseTyping | ClearTypingStyle, CursorAlignOnScroll = AlignCursorOnScrollIfNeeded, TextGranularity = CharacterGranularity);
     void setSelection(const VisibleSelection& selection, TextGranularity granularity) { setSelection(selection, CloseTyping | ClearTypingStyle, AlignCursorOnScrollIfNeeded, granularity); }
     // TODO(yosin) We should get rid of |Range| version of |setSelectedRagne()|
     // for Oilpan.
-    bool setSelectedRange(Range*, EAffinity, DirectionalOption = NonDirectional, SetSelectionOptions = CloseTyping | ClearTypingStyle);
-    bool setSelectedRange(const EphemeralRange&, EAffinity, DirectionalOption = NonDirectional, SetSelectionOptions = CloseTyping | ClearTypingStyle);
+    bool setSelectedRange(Range*, TextAffinity, DirectionalOption = NonDirectional, SetSelectionOptions = CloseTyping | ClearTypingStyle);
+    bool setSelectedRange(const EphemeralRange&, TextAffinity, DirectionalOption = NonDirectional, SetSelectionOptions = CloseTyping | ClearTypingStyle);
     void selectAll();
     void clear();
     void prepareForDestruction();
 
     // Call this after doing user-triggered selections to make it easy to delete the frame you entirely selected.
     void selectFrameElementInParentIfFullySelected();
 
     bool contains(const LayoutPoint&);
 
     SelectionType selectionType() const { return m_selection.selectionType(); }
 
-    EAffinity affinity() const { return m_selection.affinity(); }
+    TextAffinity affinity() const { return m_selection.affinity(); }
 
     bool modify(EAlteration, SelectionDirection, TextGranularity, EUserTriggered = NotUserTriggered);
     enum VerticalDirection { DirectionUp, DirectionDown };
     bool modify(EAlteration, unsigned verticalDistance, VerticalDirection, EUserTriggered = NotUserTriggered, CursorAlignOnScroll = AlignCursorOnScrollIfNeeded);
 
     // Moves the selection extent based on the selection granularity strategy.
     // This function does not allow the selection to collapse. If the new
     // extent is resolved to the same position as the current base, this
     // function will do nothing.
     void moveRangeSelectionExtent(const IntPoint&);
@@ skipping 202 matching lines @@
 }
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showTree(const blink::FrameSelection&);
 void showTree(const blink::FrameSelection*);
 #endif
 
 #endif // FrameSelection_h