Replace ComputeVisibleSelectionInDOMTreeDeprecated() in EnabledInRich…

…lyEditableText()

This patch changes changes |ComputeVisibleSelectionInDOMTreeDeprecated()|
to |ComputeVisibleSelectionInDOMTree()| in |EnabledInRichlyEditableText()| for
improving code health.

This patch is similar to the patch[1].

[1] http://crrev.com/c/591087: Replace ComputeVisibleSelectionInDOMTreeDeprecated()
in EnabledRangeInRichlyEditableText()

Bug: 698633
Change-Id: I8e128544ee6ec90186607c743e82f0a03c5f04b9
Reviewed-on: https://chromium-review.googlesource.com/590971
Reviewed-by: Yoichi Osato <yoichio@chromium.org>
Commit-Queue: Yoichi Osato <yoichio@chromium.org>
Cr-Commit-Position: refs/heads/master@{#490328}

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

@@ -2168,15 +2168,10 @@ static bool EnabledInRichlyEditableText(LocalFrame& frame,
   if (source == kCommandFromMenuOrKeyBinding &&
       !frame.Selection().SelectionHasFocus())
     return false;
-  return !frame.Selection()
-              .ComputeVisibleSelectionInDOMTreeDeprecated()
-              .IsNone() &&
-         frame.Selection()
-             .ComputeVisibleSelectionInDOMTreeDeprecated()
-             .IsContentRichlyEditable() &&
-         frame.Selection()
-             .ComputeVisibleSelectionInDOMTreeDeprecated()
-             .RootEditableElement();
+  const VisibleSelection& selection =
+      frame.Selection().ComputeVisibleSelectionInDOMTree();
+  return !selection.IsNone() && selection.IsContentRichlyEditable() &&
+         selection.RootEditableElement();
 }
 
 static bool EnabledPaste(LocalFrame& frame,