Make contenteditable="false" element as atomic node for selection motion

LayoutTests/platform/chromium-win/editing/selection/mixed-editability-3-expected.txt

Index: LayoutTests/platform/chromium-win/editing/selection/mixed-editability-3-expected.txt
diff --git a/LayoutTests/platform/chromium-win/editing/selection/mixed-editability-3-expected.txt b/LayoutTests/platform/chromium-win/editing/selection/mixed-editability-3-expected.txt
deleted file mode 100644
index 4a01649920ca5772cc9a62d589995e5d58a99029..0000000000000000000000000000000000000000
--- a/LayoutTests/platform/chromium-win/editing/selection/mixed-editability-3-expected.txt
+++ /dev/null
@@ -1,32 +0,0 @@
-EDITING DELEGATE: shouldBeginEditingInDOMRange:range from 0 of DIV > BODY > HTML > #document to 3 of DIV > BODY > HTML > #document
-EDITING DELEGATE: webViewDidBeginEditing:WebViewDidBeginEditingNotification
-EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: shouldEndEditingInDOMRange:range from 0 of DIV > BODY > HTML > #document to 3 of DIV > BODY > HTML > #document
-EDITING DELEGATE: webViewDidEndEditing:WebViewDidEndEditingNotification
-EDITING DELEGATE: shouldBeginEditingInDOMRange:range from 0 of TD > TR > TBODY > TABLE > DIV > BODY > HTML > #document to 1 of TD > TR > TBODY > TABLE > DIV > BODY > HTML > #document
-EDITING DELEGATE: webViewDidBeginEditing:WebViewDidBeginEditingNotification
-EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-layer at (0,0) size 800x600
-  RenderView at (0,0) size 800x600
-layer at (0,0) size 800x600
-  RenderBlock {HTML} at (0,0) size 800x600
-    RenderBody {BODY} at (8,8) size 784x584
-      RenderBlock {P} at (0,0) size 784x40
-        RenderText {#text} at (0,0) size 763x39
-          text run at (0,0) width 433: "This tests moving the caret forward through content of mixed editability. "
-          text run at (433,0) width 330: "The caret should move down one line from the editable"
-          text run at (0,20) width 404: "piece to the editable piece that's embedded in a non-editable piece."
-      RenderBlock {DIV} at (0,56) size 784x70
-        RenderBlock (anonymous) at (0,0) size 784x20
-          RenderText {#text} at (0,0) size 47x19
-            text run at (0,0) width 47: "editable"
-        RenderTable {TABLE} at (0,20) size 57x30 [border: (1px outset #808080)]
-          RenderTableSection {TBODY} at (1,1) size 55x28
-            RenderTableRow {TR} at (0,2) size 55x24
-              RenderTableCell {TD} at (2,2) size 51x24 [border: (1px inset #808080)] [r=0 c=0 rs=1 cs=1]
-                RenderText {#text} at (2,2) size 47x19
-                  text run at (2,2) width 47: "editable"
-        RenderBlock (anonymous) at (0,50) size 784x20
-          RenderText {#text} at (0,0) size 47x19
-            text run at (0,0) width 47: "editable"
-caret: position 0 of child 0 {#text} of child 0 {TD} of child 0 {TR} of child 0 {TBODY} of child 1 {TABLE} of child 2 {DIV} of body