Fix some warnings.

lib/dom/templates/html/impl/impl_Node.darttemplate

Index: lib/dom/templates/html/impl/impl_Node.darttemplate
diff --git a/lib/dom/templates/html/impl/impl_Node.darttemplate b/lib/dom/templates/html/impl/impl_Node.darttemplate
index 9295a1ee8ad470d1832ca545828d918e91951796..032c5570fe9985cd988f2b1dcd09654bd5df43d5 100644
--- a/lib/dom/templates/html/impl/impl_Node.darttemplate
+++ b/lib/dom/templates/html/impl/impl_Node.darttemplate
@@ -37,11 +37,11 @@ $endif
   }
 
   _NodeImpl removeLast() {
-    final last = last();
-    if (last != null) {
-      _this.$dom_removeChild(last);
+    final result = last();
+    if (result != null) {
+      _this.$dom_removeChild(result);
     }
-    return last;
+    return result;
   }
 
   void clear() {
@@ -83,21 +83,21 @@ $endif
   int lastIndexOf(Node element, [int start = 0]) =>
       _Lists.lastIndexOf(this, element, start);
 
-  // FIXME: implement thesee.
-  void setRange(int start, int length, List<Node> from, [int startFrom]) {
+  // FIXME: implement these.
+  void setRange(int start, int rangeLength, List<Node> from, [int startFrom]) {
     throw new UnsupportedOperationException(
         "Cannot setRange on immutable List.");
   }
-  void removeRange(int start, int length) {
+  void removeRange(int start, int rangeLength) {
     throw new UnsupportedOperationException(
         "Cannot removeRange on immutable List.");
   }
-  void insertRange(int start, int length, [Node initialValue]) {
+  void insertRange(int start, int rangeLength, [Node initialValue]) {
     throw new UnsupportedOperationException(
         "Cannot insertRange on immutable List.");
   }
-  NodeList getRange(int start, int length) =>
-    new _NodeListWrapper(_Lists.getRange(this, start, length, <Node>[]));
+  NodeList getRange(int start, int rangeLength) =>
+    new _NodeListWrapper(_Lists.getRange(this, start, rangeLength, <Node>[]));
 
   // -- end List<Node> mixins.