AccessibilityRenderObject.cpp and InsertTextCommand.cpp
https://bugs.webkit.org/show_bug.cgi?id=66014

Reviewed by Hajime Morita.

Removed calls to deprecatedNode and deprecatedEditingOffsets in the following files.

* accessibility/AccessibilityRenderObject.cpp:
(WebCore::AccessibilityRenderObject::indexForVisiblePosition): Calls Position::rootEditableElement
and Range::setEnd(const Position&, ExceptionCode) instead of manually pulling deprecatedNode
and deprecatedEditingOffset.
(WebCore::AccessibilityRenderObject::index): Abstracted the logic to loop through render objects
from deprecatedNodes' renderer to m_renderer as renderObjectContainsPosition.
* dom/Position.h:
(WebCore::Position::rootEditableElement): Added.
* dom/Range.cpp:
(WebCore::Range::setStart): Added.
(WebCore::Range::setEnd): Added.
* dom/Range.h:
* editing/InsertTextCommand.cpp:
(WebCore::InsertTextCommand::insertTab):
* editing/RenderedPosition.cpp:
(WebCore::renderObjectContainsPosition): Extracted from AccessibilityRenderObject::index.
* editing/RenderedPosition.h:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@93199 268f45cc-cd09-0410-ab3c-d52691b4dbfc