Convert editing/style/apple-style-editable-mix.html to utilize w3c test harness

third_party/WebKit/LayoutTests/platform/win/editing/style/apple-style-editable-mix-expected.txt

-EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
-layer at (0,0) size 800x600
-  LayoutView at (0,0) size 800x600
-layer at (0,0) size 800x600
-  LayoutBlockFlow {HTML} at (0,0) size 800x600
-    LayoutBlockFlow {BODY} at (8,8) size 784x584
-      LayoutTable {TABLE} at (0,0) size 777x24
-        LayoutTableSection {TBODY} at (0,0) size 777x24
-          LayoutTableRow {TR} at (0,2) size 777x20
-            LayoutTableCell {TD} at (2,2) size 660x20 [r=0 c=0 rs=1 cs=1]
-              LayoutText {#text} at (1,1) size 658x17
-                text run at (1,1) width 658: "This tests that a style can be applied to a selection that contains both editable and non-editable content."
-                text run at (658,1) width 1: "             "
-            LayoutTableCell {TD} at (664,2) size 111x20 [r=0 c=1 rs=1 cs=1]
-              LayoutInline {SPAN} at (0,0) size 108x17
-                LayoutInline {B} at (0,0) size 108x17
-                  LayoutText {#text} at (1,1) size 108x17
-                    text run at (1,1) width 108: "Editable - line 1"
-              LayoutText {#text} at (109,1) size 1x17
-                text run at (109,1) width 1: "             "
-      LayoutTable {TABLE} at (0,24) size 726x24
-        LayoutTableSection {TBODY} at (0,0) size 726x24
-          LayoutTableRow {TR} at (0,2) size 726x20
-            LayoutTableCell {TD} at (2,2) size 609x20 [r=0 c=0 rs=1 cs=1]
-              LayoutText {#text} at (1,1) size 607x17
-                text run at (1,1) width 607: "The test passes if the editable content is bold, and the non editable content remains unchanged."
-                text run at (607,1) width 1: "             "
-            LayoutTableCell {TD} at (613,2) size 111x20 [r=0 c=1 rs=1 cs=1]
-              LayoutInline {SPAN} at (0,0) size 108x17
-                LayoutInline {B} at (0,0) size 108x17
-                  LayoutText {#text} at (1,1) size 108x17
-                    text run at (1,1) width 108: "Editable - line 2"
-              LayoutText {#text} at (109,1) size 1x17
-                text run at (109,1) width 1: "             "
-selection start: position 0 of child 1 {TABLE} of body
-selection end:   position 2 of child 3 {TABLE} of body