Deferred (aka lazy) loading of static functions.

dart/tests/compiler/dart2js/mock_compiler.dart

Index: dart/tests/compiler/dart2js/mock_compiler.dart
diff --git a/dart/tests/compiler/dart2js/mock_compiler.dart b/dart/tests/compiler/dart2js/mock_compiler.dart
index 39ab91232eb9da882767195b047b918d494137bd..7ddd2e45d82e26ca2a238b6982a3cd7540ee2165 100644
--- a/dart/tests/compiler/dart2js/mock_compiler.dart
+++ b/dart/tests/compiler/dart2js/mock_compiler.dart
@@ -25,6 +25,10 @@ import '../../../sdk/lib/_internal/compiler/implementation/dart2jslib.dart'
 
 import '../../../sdk/lib/_internal/compiler/implementation/dart_types.dart';
 
+import '../../../sdk/lib/_internal/compiler/implementation/deferred_load.dart'
+    show DeferredLoadTask;
+
+
 class WarningMessage {
   Node node;
   Message message;
@@ -167,6 +171,8 @@ class MockCompiler extends Compiler {
     // Our unit tests check code generation output that is affected by
     // inlining support.
     disableInlining = true;
+
+    deferredLoadTask = new MockDeferredLoadTask(this);
   }
 
   /**
@@ -342,3 +348,11 @@ class CollectingTreeElements extends TreeElementMapping {
     map.remove(node);
   }
 }
+
+class MockDeferredLoadTask extends DeferredLoadTask {
+  MockDeferredLoadTask(Compiler compiler) : super(compiler);
+
+  void registerMainApp(LibraryElement mainApp) {
+    // Do nothing.
+  }
+}