Prune ComputeVisibleSelectionInDOMTreeDeprecated from EditorCommand.cpp

This patch prunes the deprecated function from EditorCommand.cpp, which
is safe because layout is already clean at the call sites, updated
in Editor::Command::Execute() before calling the ExecuteFoo() functions.

Bug: 698633
Change-Id: I011cb5dbc95a8b2a5d2b9289db6610471688094a
Reviewed-on: https://chromium-review.googlesource.com/777476Reviewed-by: Yoichi Osato <yoichio@chromium.org>
Reviewed-by: Yoshifumi Inoue <yosin@chromium.org>
Commit-Queue: Xiaocheng Hu <xiaochengh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#517756}

third_party/WebKit/Source/core/editing/commands/EditorCommand.cpp

@@ -303,7 +303,7 @@ static bool ExecuteToggleStyleInList(LocalFrame& frame,
                                      CSSValue* value) {
   EditingStyle* selection_style =
       EditingStyleUtilities::CreateStyleAtSelectionStart(
-          frame.Selection().ComputeVisibleSelectionInDOMTreeDeprecated());
+          frame.Selection().ComputeVisibleSelectionInDOMTree());
   if (!selection_style || !selection_style->Style())
     return false;
 
@@ -399,12 +399,9 @@ static bool ExpandSelectionToGranularity(LocalFrame& frame,
                                          TextGranularity granularity) {
   const VisibleSelection& selection = CreateVisibleSelectionWithGranularity(
       SelectionInDOMTree::Builder()
-          .SetBaseAndExtent(frame.Selection()
-                                .ComputeVisibleSelectionInDOMTreeDeprecated()
-                                .Base(),
-                            frame.Selection()
-                                .ComputeVisibleSelectionInDOMTreeDeprecated()
-                                .Extent())
+          .SetBaseAndExtent(
+              frame.Selection().ComputeVisibleSelectionInDOMTree().Base(),
+              frame.Selection().ComputeVisibleSelectionInDOMTree().Extent())
           .Build(),
       granularity);
   const EphemeralRange new_range = selection.ToNormalizedEphemeralRange();