Rename XMatching to XWhere.

tools/dom/templates/immutable_list_mixin.darttemplate

   // -- start List<$E> mixins.
   // $E is the element type.
 
   // From Iterable<$E>:
 
   Iterator<$E> get iterator {
     // Note: NodeLists are not fixed size. And most probably length shouldn't
     // be cached in both iterator _and_ forEach method. For now caching it
     // for consistency.
     return new FixedSizeListIterator<$E>(this);
@@ skipping 43 matching lines @@
   Iterable<$E> takeWhile(bool test($E value)) {
     return IterableMixinWorkaround.takeWhile(this, test);
   }
 
   Iterable<$E> skip(int n) => IterableMixinWorkaround.skipList(this, n);
 
   Iterable<$E> skipWhile(bool test($E value)) {
     return IterableMixinWorkaround.skipWhile(this, test);
   }
 
-  $E firstMatching(bool test($E value), { $E orElse() }) {
-    return IterableMixinWorkaround.firstMatching(this, test, orElse);
+  $E firstWhere(bool test($E value), { $E orElse() }) {
+    return IterableMixinWorkaround.firstWhere(this, test, orElse);
   }
 
-  $E lastMatching(bool test($E value), {$E orElse()}) {
-    return IterableMixinWorkaround.lastMatchingInList(this, test, orElse);
+  $E lastWhere(bool test($E value), {$E orElse()}) {
+    return IterableMixinWorkaround.lastWhereList(this, test, orElse);
   }
 
-  $E singleMatching(bool test($E value)) {
-    return IterableMixinWorkaround.singleMatching(this, test);
+  $E singleWhere(bool test($E value)) {
+    return IterableMixinWorkaround.singleWhere(this, test);
   }
 
   $E elementAt(int index) {
     return this[index];
   }
 
   // From Collection<$E>:
 
   void add($E value) {
     throw new UnsupportedError("Cannot add to immutable List.");
@@ skipping 73 matching lines @@
   }
 
   void removeAll(Iterable elements) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
 
   void retainAll(Iterable elements) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
 
-  void removeMatching(bool test($E element)) {
+  void removeWhere(bool test($E element)) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
 
-  void retainMatching(bool test($E element)) {
+  void retainWhere(bool test($E element)) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
 
   void setRange(int start, int rangeLength, List<$E> from, [int startFrom]) {
     throw new UnsupportedError("Cannot setRange on immutable List.");
   }
 
   void removeRange(int start, int rangeLength) {
     throw new UnsupportedError("Cannot removeRange on immutable List.");
   }
 
   void insertRange(int start, int rangeLength, [$E initialValue]) {
     throw new UnsupportedError("Cannot insertRange on immutable List.");
   }
 
   List<$E> getRange(int start, int rangeLength) =>
       Lists.getRange(this, start, rangeLength, <$E>[]);
 
   Map<int, $E> asMap() =>
     IterableMixinWorkaround.asMapList(this);
 
   // -- end List<$E> mixins.