Deferred (aka lazy) loading of static functions.

dart/sdk/lib/_internal/compiler/implementation/compiler.dart

Index: dart/sdk/lib/_internal/compiler/implementation/compiler.dart
diff --git a/dart/sdk/lib/_internal/compiler/implementation/compiler.dart b/dart/sdk/lib/_internal/compiler/implementation/compiler.dart
index aebbee6df5ee8d25619dc2bbb4c17afd90cb1d99..422608791f753d745deb4fce2440c9439f57a3c6 100644
--- a/dart/sdk/lib/_internal/compiler/implementation/compiler.dart
+++ b/dart/sdk/lib/_internal/compiler/implementation/compiler.dart
@@ -234,6 +234,9 @@ abstract class Compiler implements DiagnosticListener {
   ClassElement listClass;
   ClassElement typeClass;
   ClassElement mapClass;
+  ClassElement deferLoadClass;
+  ClassElement onLibraryLoadedClass;
+
   ClassElement jsInvocationMirrorClass;
   /// Document class from dart:mirrors.
   ClassElement documentClass;
@@ -291,6 +294,7 @@ abstract class Compiler implements DiagnosticListener {
   ConstantHandler metadataHandler;
   EnqueueTask enqueuer;
   CompilerTask fileReadingTask;
+  DeferredLoadTask deferredLoadTask;
 
   static const SourceString MAIN = const SourceString('main');
   static const SourceString CALL_OPERATOR_NAME = const SourceString('call');
@@ -369,6 +373,7 @@ abstract class Compiler implements DiagnosticListener {
       checker = new TypeCheckerTask(this),
       typesTask = new ti.TypesTask(this),
       constantHandler = new ConstantHandler(this, backend.constantSystem),
+      deferredLoadTask = new DeferredLoadTask(this),
       enqueuer = new EnqueueTask(this)];
 
     tasks.addAll(backend.tasks);
@@ -521,6 +526,8 @@ abstract class Compiler implements DiagnosticListener {
     listClass = lookupCoreClass('List');
     typeClass = lookupCoreClass('Type');
     mapClass = lookupCoreClass('Map');
+    deferLoadClass = lookupCoreClass('DeferLoad');
+    onLibraryLoadedClass = lookupCoreClass('OnLibraryLoaded');
     if (!missingCoreClasses.isEmpty) {
       internalErrorOnElement(coreLibrary,
           'dart:core library does not contain required classes: '
@@ -635,6 +642,8 @@ abstract class Compiler implements DiagnosticListener {
       }
     }
 
+    deferredLoadTask.registerMainApp(mainApp);
+
     log('Resolving...');
     phase = PHASE_RESOLVING;
     if (analyzeAll) {