No selection change notification for editing operation that doesn't change the selection's DOM position
        
Reviewed by Ojan Vafai.

WebCore: 

Some editing operations change the selection visually without affecting its position within 
the DOM.  This was previously known to occur for certain typing commands, but it can also 
occur for some Pastes and changes to block style.

* editing/Editor.cpp:
(WebCore::Editor::appliedEditing):
(WebCore::Editor::unappliedEditing):
(WebCore::Editor::reappliedEditing):
(WebCore::Editor::changeSelectionAfterCommand):
* editing/Editor.h:

LayoutTests: 

block-style-001.html demonstrated the bug, so no new tests have been added.

* platform/mac/editing/execCommand/format-block-expected.txt:
* platform/mac/editing/execCommand/outdent-selection-expected.txt:
* platform/mac/editing/pasteboard/paste-text-005-expected.txt:
* platform/mac/editing/pasteboard/paste-text-006-expected.txt:
* platform/mac/editing/pasteboard/paste-text-007-expected.txt:
* platform/mac/editing/pasteboard/paste-text-014-expected.txt:
* platform/mac/editing/style/apple-style-editable-mix-expected.txt:
* platform/mac/editing/style/block-style-001-expected.txt:
* platform/mac/editing/style/block-style-002-expected.txt:
* platform/mac/editing/style/block-style-003-expected.txt:
* platform/mac/editing/style/create-block-for-style-005-expected.txt:
* platform/mac/editing/style/create-block-for-style-006-expected.txt:
* platform/mac/editing/style/create-block-for-style-008-expected.txt:
* platform/mac/editing/style/relative-font-size-change-002-expected.txt:
* platform/mac/editing/style/relative-font-size-change-003-expected.txt:
* platform/mac/editing/style/relative-font-size-change-004-expected.txt:
* platform/mac/editing/style/table-selection-expected.txt:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@61418 268f45cc-cd09-0410-ab3c-d52691b4dbfc