Aggregate CSS manipulation functions in html lib.

sdk/lib/html/html_common/css_class_set.dart

Index: sdk/lib/html/html_common/css_class_set.dart
diff --git a/tools/dom/src/CssClassSet.dart b/sdk/lib/html/html_common/css_class_set.dart
similarity index 93%
copy from tools/dom/src/CssClassSet.dart
copy to sdk/lib/html/html_common/css_class_set.dart
index acae69c9743377cc71300c1e4ce0b8f54e550a5e..df50d622f1ff5b7dd3d1afe39f5dbb0296726748 100644
--- a/tools/dom/src/CssClassSet.dart
+++ b/sdk/lib/html/html_common/css_class_set.dart
@@ -2,9 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-part of html;
+part of html_common;
 
-abstract class CssClassSet implements Set<String> {
+abstract class CssClassSetImpl implements CssClassSet {
 
   String toString() {
     return readClasses().join(' ');
@@ -86,7 +86,7 @@ abstract class CssClassSet implements Set<String> {
   void add(String value) {
     // TODO - figure out if we need to do any validation here
     // or if the browser natively does enough.
-    _modify((s) => s.add(value));
+    modify((s) => s.add(value));
   }
 
   /**
@@ -112,7 +112,7 @@ abstract class CssClassSet implements Set<String> {
    */
   void addAll(Iterable<String> iterable) {
     // TODO - see comment above about validation.
-    _modify((s) => s.addAll(iterable));
+    modify((s) => s.addAll(iterable));
   }
 
   /**
@@ -122,7 +122,7 @@ abstract class CssClassSet implements Set<String> {
    * [removeClass](http://api.jquery.com/removeClass/).
    */
   void removeAll(Iterable<String> iterable) {
-    _modify((s) => s.removeAll(iterable));
+    modify((s) => s.removeAll(iterable));
   }
 
   /**
@@ -137,15 +137,15 @@ abstract class CssClassSet implements Set<String> {
   }
 
   void retainAll(Iterable<String> iterable) {
-    _modify((s) => s.retainAll(iterable));
+    modify((s) => s.retainAll(iterable));
   }
 
   void removeWhere(bool test(String name)) {
-    _modify((s) => s.removeWhere(test));
+    modify((s) => s.removeWhere(test));
   }
 
   void retainWhere(bool test(String name)) {
-    _modify((s) => s.retainWhere(test));
+    modify((s) => s.retainWhere(test));
   }
 
   bool containsAll(Iterable<String> collection) =>
@@ -181,7 +181,7 @@ abstract class CssClassSet implements Set<String> {
   String elementAt(int index) => readClasses().elementAt(index);
 
   void clear() {
-    _modify((s) => s.clear());
+    modify((s) => s.clear());
   }
   // interface Set - END
 
@@ -194,7 +194,7 @@ abstract class CssClassSet implements Set<String> {
    *   After f returns, the modified set is written to the
    *       className property of this element.
    */
-  void _modify( f(Set<String> s)) {
+  void modify( f(Set<String> s)) {
     Set<String> s = readClasses();
     f(s);
     writeClasses(s);