Refactoring: Removing unused variables and duplicate function call.

Source/core/editing/htmlediting.cpp

Index: Source/core/editing/htmlediting.cpp
diff --git a/Source/core/editing/htmlediting.cpp b/Source/core/editing/htmlediting.cpp
index 858d2e4a51e38575cdd74a96aad6ef3aa0aaad5c..920b4aaa4b4fb0a824c5df2fa163f5e811382813 100644
--- a/Source/core/editing/htmlediting.cpp
+++ b/Source/core/editing/htmlediting.cpp
@@ -138,10 +138,6 @@ Node* highestEditableRoot(const Position& position, EditableType editableType)
 
 Node* lowestEditableAncestor(Node* node)
 {
-    if (!node)
-        return 0;
-
-    Node* lowestRoot = 0;
     while (node) {
         if (node->rendererIsEditable())
             return node->rootEditableElement();
@@ -150,7 +146,7 @@ Node* lowestEditableAncestor(Node* node)
         node = node->parentNode();
     }
 
-    return lowestRoot;
+    return 0;
 }
 
 bool isEditablePosition(const Position& p, EditableType editableType, EUpdateStyle updateStyle)