HTMLTextAreaElement.setSelectionRange should not change focus.

Source/core/html/HTMLTextFormControlElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2009, 2010, 2011 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 24 matching lines @@
 class RenderTextControl;
 class VisiblePosition;
 
 enum TextFieldSelectionDirection { SelectionHasNoDirection, SelectionHasForwardDirection, SelectionHasBackwardDirection };
 enum TextFieldEventBehavior { DispatchNoEvent, DispatchChangeEvent, DispatchInputAndChangeEvent };
 
 class HTMLTextFormControlElement : public HTMLFormControlElementWithState {
 public:
     // Common flag for HTMLInputElement::tooLong() and HTMLTextAreaElement::tooLong().
     enum NeedsToCheckDirtyFlag {CheckDirtyFlag, IgnoreDirtyFlag};
+    // Option of setSelectionRange.
+    enum SelectionOption {
+        ChangeSelection,
+        NotChangeSelection
+    };
 
     virtual ~HTMLTextFormControlElement();
 
     void forwardEvent(Event*);
 
 
     virtual InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE;
 
     // The derived class should return true if placeholder processing is needed.
     virtual bool supportsPlaceholder() const = 0;
     String strippedPlaceholder() const;
     bool placeholderShouldBeVisible() const;
     HTMLElement* placeholderElement() const;
     void updatePlaceholderVisibility(bool);
 
     VisiblePosition visiblePositionForIndex(int) const;
     int indexForVisiblePosition(const VisiblePosition&) const;
     int selectionStart() const;
     int selectionEnd() const;
     const AtomicString& selectionDirection() const;
     void setSelectionStart(int);
     void setSelectionEnd(int);
     void setSelectionDirection(const String&);
     void select();
     virtual void setRangeText(const String& replacement, ExceptionState&);
     virtual void setRangeText(const String& replacement, unsigned start, unsigned end, const String& selectionMode, ExceptionState&);
     void setSelectionRange(int start, int end, const String& direction);
-    void setSelectionRange(int start, int end, TextFieldSelectionDirection = SelectionHasNoDirection);
+    void setSelectionRange(int start, int end, TextFieldSelectionDirection = SelectionHasNoDirection, SelectionOption = ChangeSelection);
     PassRefPtrWillBeRawPtr<Range> selection() const;
 
     virtual void dispatchFormControlChangeEvent() OVERRIDE FINAL;
 
     virtual String value() const = 0;
 
     HTMLElement* innerEditorElement() const;
 
     void selectionChanged(bool userTriggered);
     bool lastChangeWasUserEdit() const;
@@ skipping 69 matching lines @@
 }
 
 DEFINE_HTMLELEMENT_TYPE_CASTS_WITH_FUNCTION(HTMLTextFormControlElement);
 
 HTMLTextFormControlElement* enclosingTextFormControl(const Position&);
 HTMLTextFormControlElement* enclosingTextFormControl(Node*);
 
 } // namespace
 
 #endif