Revert of Have Position deal with more references

Source/core/editing/InsertParagraphSeparatorCommand.cpp

Index: Source/core/editing/InsertParagraphSeparatorCommand.cpp
diff --git a/Source/core/editing/InsertParagraphSeparatorCommand.cpp b/Source/core/editing/InsertParagraphSeparatorCommand.cpp
index 0e71a2bef961cfbc60dc8066bf495e826e89ef42..7f982205430f57b1261488288021694fffe2114a 100644
--- a/Source/core/editing/InsertParagraphSeparatorCommand.cpp
+++ b/Source/core/editing/InsertParagraphSeparatorCommand.cpp
@@ -388,7 +388,7 @@
         appendNode(createBreakElement(document()).get(), blockToInsert.get());
 
     // Move the start node and the siblings of the start node.
-    if (VisiblePosition(insertionPosition) != VisiblePosition(positionBeforeNode(*blockToInsert))) {
+    if (VisiblePosition(insertionPosition) != VisiblePosition(positionBeforeNode(blockToInsert.get()))) {
         Node* n;
         if (insertionPosition.containerNode() == startBlock)
             n = insertionPosition.computeNodeAfterPosition();
@@ -400,7 +400,7 @@
             splitTreeToNode(splitTo, startBlock.get());
 
             for (n = startBlock->firstChild(); n; n = n->nextSibling()) {
-                VisiblePosition beforeNodePosition(positionBeforeNode(*n));
+                VisiblePosition beforeNodePosition(positionBeforeNode(n));
                 if (!beforeNodePosition.isNull() && comparePositions(VisiblePosition(insertionPosition), beforeNodePosition) <= 0)
                     break;
             }