Add List.first.

sdk/lib/svg/dart2js/svg_dart2js.dart

Index: sdk/lib/svg/dart2js/svg_dart2js.dart
diff --git a/sdk/lib/svg/dart2js/svg_dart2js.dart b/sdk/lib/svg/dart2js/svg_dart2js.dart
index ef6935a5314d35df6a1185989893e970b7303f9b..d21f0f9d8e10cafadf0c1249e247f872669ac941 100644
--- a/sdk/lib/svg/dart2js/svg_dart2js.dart
+++ b/sdk/lib/svg/dart2js/svg_dart2js.dart
@@ -374,6 +374,8 @@ class SVGAnimatedLengthList implements JavaScriptIndexingBehavior, List<SVGAnima
     return _Lists.lastIndexOf(this, element, start);
   }
 
+  SVGAnimatedLength get first => this[0];
+
   SVGAnimatedLength get last => this[length - 1];
 
   SVGAnimatedLength removeLast() {
@@ -485,6 +487,8 @@ class SVGAnimatedNumberList implements JavaScriptIndexingBehavior, List<SVGAnima
     return _Lists.lastIndexOf(this, element, start);
   }
 
+  SVGAnimatedNumber get first => this[0];
+
   SVGAnimatedNumber get last => this[length - 1];
 
   SVGAnimatedNumber removeLast() {
@@ -624,6 +628,8 @@ class SVGAnimatedTransformList implements JavaScriptIndexingBehavior, List<SVGAn
     return _Lists.lastIndexOf(this, element, start);
   }
 
+  SVGAnimateTransformElement get first => this[0];
+
   SVGAnimateTransformElement get last => this[length - 1];
 
   SVGAnimateTransformElement removeLast() {
@@ -3050,6 +3056,8 @@ class SVGLengthList implements JavaScriptIndexingBehavior, List<SVGLength> nativ
     return _Lists.lastIndexOf(this, element, start);
   }
 
+  SVGLength get first => this[0];
+
   SVGLength get last => this[length - 1];
 
   SVGLength removeLast() {
@@ -3539,6 +3547,8 @@ class SVGNumberList implements JavaScriptIndexingBehavior, List<SVGNumber> nativ
     return _Lists.lastIndexOf(this, element, start);
   }
 
+  SVGNumber get first => this[0];
+
   SVGNumber get last => this[length - 1];
 
   SVGNumber removeLast() {
@@ -4198,6 +4208,8 @@ class SVGPathSegList implements JavaScriptIndexingBehavior, List<SVGPathSeg> nat
     return _Lists.lastIndexOf(this, element, start);
   }
 
+  SVGPathSeg get first => this[0];
+
   SVGPathSeg get last => this[length - 1];
 
   SVGPathSeg removeLast() {
@@ -5067,6 +5079,8 @@ class SVGStringList implements JavaScriptIndexingBehavior, List<String> native "
     return _Lists.lastIndexOf(this, element, start);
   }
 
+  String get first => this[0];
+
   String get last => this[length - 1];
 
   String removeLast() {
@@ -5631,6 +5645,8 @@ class SVGTransformList implements JavaScriptIndexingBehavior, List<SVGTransform>
     return _Lists.lastIndexOf(this, element, start);
   }
 
+  SVGTransform get first => this[0];
+
   SVGTransform get last => this[length - 1];
 
   SVGTransform removeLast() {
@@ -6009,6 +6025,8 @@ class _SVGElementInstanceList implements JavaScriptIndexingBehavior, List<SVGEle
     return _Lists.lastIndexOf(this, element, start);
   }
 
+  SVGElementInstance get first => this[0];
+
   SVGElementInstance get last => this[length - 1];
 
   SVGElementInstance removeLast() {