Make Position::BeforeNode() to take const Node& instead of Node*

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

Index: third_party/WebKit/Source/core/editing/SelectionAdjuster.cpp
diff --git a/third_party/WebKit/Source/core/editing/SelectionAdjuster.cpp b/third_party/WebKit/Source/core/editing/SelectionAdjuster.cpp
index 2ed10f7090cccc9eb40b19e40d567ce0a42a792d..565a6bc650129f3840530c8acc0dd99e7b4fe21a 100644
--- a/third_party/WebKit/Source/core/editing/SelectionAdjuster.cpp
+++ b/third_party/WebKit/Source/core/editing/SelectionAdjuster.cpp
@@ -84,7 +84,7 @@ PositionInFlatTree AdjustPositionInFlatTreeForStart(
     Node* shadow_host) {
   if (IsEnclosedBy(position, *shadow_host)) {
     if (position.IsBeforeChildren())
-      return PositionInFlatTree::BeforeNode(shadow_host);
+      return PositionInFlatTree::BeforeNode(*shadow_host);
     return PositionInFlatTree::AfterNode(shadow_host);
   }
 
@@ -92,7 +92,7 @@ PositionInFlatTree AdjustPositionInFlatTreeForStart(
   // compatibility. The positions are same but the anchors would be different,
   // and selection painting uses anchor nodes.
   if (Node* first_child = FlatTreeTraversal::FirstChild(*shadow_host))
-    return PositionInFlatTree::BeforeNode(first_child);
+    return PositionInFlatTree::BeforeNode(*first_child);
   return PositionInFlatTree();
 }
 
@@ -106,7 +106,7 @@ Position AdjustPositionForEnd(const Position& current_position,
           current_position.ComputeContainerNode())) {
     if (ancestor->contains(start_container_node))
       return Position::AfterNode(ancestor);
-    return Position::BeforeNode(ancestor);
+    return Position::BeforeNode(*ancestor);
   }
 
   if (Node* last_child = tree_scope.RootNode().lastChild())
@@ -121,7 +121,7 @@ PositionInFlatTree AdjustPositionInFlatTreeForEnd(
   if (IsEnclosedBy(position, *shadow_host)) {
     if (position.IsAfterChildren())
       return PositionInFlatTree::AfterNode(shadow_host);
-    return PositionInFlatTree::BeforeNode(shadow_host);
+    return PositionInFlatTree::BeforeNode(*shadow_host);
   }
 
   // We use |lastChild|'s after instead of afterAllChildren for backward
@@ -141,12 +141,12 @@ Position AdjustPositionForStart(const Position& current_position,
   if (Node* ancestor = tree_scope.AncestorInThisScope(
           current_position.ComputeContainerNode())) {
     if (ancestor->contains(end_container_node))
-      return Position::BeforeNode(ancestor);
+      return Position::BeforeNode(*ancestor);
     return Position::AfterNode(ancestor);
   }
 
   if (Node* first_child = tree_scope.RootNode().firstChild())
-    return Position::BeforeNode(first_child);
+    return Position::BeforeNode(*first_child);
 
   return Position();
 }