[Editing][Regression] Contenteditable w/ "-webkit-user-select:all" should be editable for drag.

third_party/WebKit/Source/core/editing/EditingStrategy.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/editing/EditingStrategy.h"
 
 #include "core/editing/EditingUtilities.h"
 #include "core/layout/LayoutObject.h"
 
 namespace blink {
@@ skipping 51 matching lines @@
     // editingIgnoresContent uses the same logic in
     // isEmptyNonEditableNodeInEditable (EditingUtilities.cpp). We don't
     // understand why this function returns 1 even when the node doesn't have
     // children.
     return 1;
 }
 
 template <typename Strategy>
 Node* EditingAlgorithm<Strategy>::rootUserSelectAllForNode(Node* node)
 {
-    if (!node || !nodeIsUserSelectAll(node))
+    if (!node || usedValueOfUserSelect(*node) != SELECT_ALL)
         return nullptr;
     Node* parent = Strategy::parent(*node);
     if (!parent)
         return node;
 
     Node* candidateRoot = node;
     while (parent) {
         if (!parent->layoutObject()) {
             parent = Strategy::parent(*parent);
             continue;
         }
-        if (!nodeIsUserSelectAll(parent))
+        if (usedValueOfUserSelect(*parent) != SELECT_ALL)
             break;
         candidateRoot = parent;
         parent = Strategy::parent(*candidateRoot);
     }
     return candidateRoot;
 }
 
 template class CORE_TEMPLATE_EXPORT EditingAlgorithm<NodeTraversal>;
 template class CORE_TEMPLATE_EXPORT EditingAlgorithm<FlatTreeTraversal>;
 
 } // namespace blink