isolates refactor: this change introduces 'dart:isolate' as a library. This is a

compiler/java/com/google/dart/compiler/resolver/CoreTypeProviderImplementation.java

Index: compiler/java/com/google/dart/compiler/resolver/CoreTypeProviderImplementation.java
diff --git a/compiler/java/com/google/dart/compiler/resolver/CoreTypeProviderImplementation.java b/compiler/java/com/google/dart/compiler/resolver/CoreTypeProviderImplementation.java
index f2e5bd02bdbb87975ae6a443f417d16e30cdb26b..b03310623e22915bd0ba74328630343b5364504a 100644
--- a/compiler/java/com/google/dart/compiler/resolver/CoreTypeProviderImplementation.java
+++ b/compiler/java/com/google/dart/compiler/resolver/CoreTypeProviderImplementation.java
@@ -30,7 +30,6 @@ public class CoreTypeProviderImplementation implements CoreTypeProvider {
   private final InterfaceType mapLiteralType;
   private final InterfaceType objectArrayType;
   private final InterfaceType objectType;
-  private final InterfaceType isolateType;
   private final InterfaceType stringImplementation;
   private final InterfaceType iteratorType;
 
@@ -51,7 +50,6 @@ public class CoreTypeProviderImplementation implements CoreTypeProvider {
     this.mapLiteralType = getType("LinkedHashMapImplementation", scope, listener);
     this.objectArrayType = getType(new String[] {"ListImplementation", "GrowableObjectArray"}, scope, listener);
     this.objectType = getType("Object", scope, listener);
-    this.isolateType = getType("Isolate", scope, listener);
     this.stringImplementation = getType(new String[] {"StringImplementation", "OneByteString"}, scope, listener);
     iteratorType = getType("Iterator", scope, listener);
   }
@@ -173,11 +171,6 @@ public class CoreTypeProviderImplementation implements CoreTypeProvider {
   }
 
   @Override
-  public InterfaceType getIsolateType() {
-    return isolateType;
-  }
-
-  @Override
   public InterfaceType getIteratorType(Type elementType) {
     return iteratorType.subst(Arrays.asList(elementType), 
         iteratorType.getElement().getTypeParameters());