Make List.remove return boolean.

sdk/lib/svg/dartium/svg_dartium.dart

Index: sdk/lib/svg/dartium/svg_dartium.dart
diff --git a/sdk/lib/svg/dartium/svg_dartium.dart b/sdk/lib/svg/dartium/svg_dartium.dart
index 3978d9402abf490d7aa8b812f77c7a6b262a8e9a..3e428086634807fc74a6507942c2ff094ab6d9b4 100644
--- a/sdk/lib/svg/dartium/svg_dartium.dart
+++ b/sdk/lib/svg/dartium/svg_dartium.dart
@@ -3425,7 +3425,7 @@ class LengthList extends NativeFieldWrapperClass1 implements List<Length> {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
 
-  void remove(Object object) {
+  bool remove(Object object) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
 
@@ -4146,7 +4146,7 @@ class NumberList extends NativeFieldWrapperClass1 implements List<Number> {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
 
-  void remove(Object object) {
+  bool remove(Object object) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
 
@@ -5294,7 +5294,7 @@ class PathSegList extends NativeFieldWrapperClass1 implements List<PathSeg> {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
 
-  void remove(Object object) {
+  bool remove(Object object) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
 
@@ -6296,7 +6296,7 @@ class StringList extends NativeFieldWrapperClass1 implements List<String> {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
 
-  void remove(Object object) {
+  bool remove(Object object) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
 
@@ -7563,7 +7563,7 @@ class TransformList extends NativeFieldWrapperClass1 implements List<Transform>
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
 
-  void remove(Object object) {
+  bool remove(Object object) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
 
@@ -8156,7 +8156,7 @@ class _ElementInstanceList extends NativeFieldWrapperClass1 implements List<Elem
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
 
-  void remove(Object object) {
+  bool remove(Object object) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }