Fix DeltaBlue and Richards.

pkgs/benchmark_harness/example/DeltaBlue.dart

@@ -448,7 +448,7 @@ class Variable {
 
   /// Removes all traces of c from this variable.
   void removeConstraint(Constraint c) {
-    constraints = constraints.where((e) => c != e).toList();
+    constraints.removeWhere((e) => c == e);
     if (determinedBy == c) determinedBy = null;
   }
 }

pkgs/benchmark_harness/example/Richards.dart

@@ -36,6 +36,7 @@
 
 import 'package:benchmark_harness/benchmark_harness.dart';
 
+
 main() {
   new Richards().report();
 }
@@ -77,8 +78,12 @@ class Richards extends BenchmarkBase {
       print("Error during execution: queueCount = ${scheduler.queueCount}"
             ", holdCount = ${scheduler.holdCount}.");
     }
-    Expect.equals(EXPECTED_QUEUE_COUNT, scheduler.queueCount);
-    Expect.equals(EXPECTED_HOLD_COUNT, scheduler.holdCount);
+    if (EXPECTED_QUEUE_COUNT != scheduler.queueCount) {
+      throw "bad scheduler queue-count";
+    }
+    if (EXPECTED_HOLD_COUNT != scheduler.holdCount) {
+      throw "bad scheduler hold-count";
+    }
   }
 
   static const int DATA_SIZE = 4;
@@ -120,7 +125,7 @@ class Scheduler {
   int currentId;
   TaskControlBlock list;
   List<TaskControlBlock> blocks =
-    new List<TaskControlBlock>.fixedLength(Richards.NUMBER_OF_IDS);
+    new List<TaskControlBlock>(Richards.NUMBER_OF_IDS);
 
   /// Add an idle task to this scheduler.
   void addIdleTask(int id, int priority, Packet queue, int count) {
@@ -461,7 +466,7 @@ class Packet {
   int kind;    // The type of this packet.
   int a1 = 0;
 
-  List<int> a2 = new List.fixedLength(Richards.DATA_SIZE);
+  List<int> a2 = new List(Richards.DATA_SIZE);
 
   Packet(this.link, this.id, this.kind);