Introduces the new syntax for deferred loading

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

Index: sdk/lib/_internal/compiler/implementation/ssa/builder.dart
diff --git a/sdk/lib/_internal/compiler/implementation/ssa/builder.dart b/sdk/lib/_internal/compiler/implementation/ssa/builder.dart
index b42ae6af9dff58125321df4620d161b83b7f5af6..94c5d98fb3f04d9204ef75ac9b057f475b879a90 100644
--- a/sdk/lib/_internal/compiler/implementation/ssa/builder.dart
+++ b/sdk/lib/_internal/compiler/implementation/ssa/builder.dart
@@ -3568,6 +3568,17 @@ class SsaBuilder extends ResolvedVisitor {
       stack.add(graph.addConstantNull(compiler));
     } else if (name == 'JS_INTERCEPTOR_CONSTANT') {
       handleJsInterceptorConstant(node);
+    } else if (name == 'loadLibrary') {
+      // TODO(sigurdm): Also make it possible to closurize loadLibrary.
+      FunctionElement deferredLoader = elements[node];
+      Element loadFunction = compiler.loadLibraryFunction;
+      PrefixElement prefixElement = deferredLoader.enclosingElement;
+      String loadId =
+          compiler.deferredLoadTask.importDeferName[prefixElement.import];
+      var inputs = [graph.addConstantString(new ast.DartString.literal(loadId),
+                                            compiler)];
+      push(new HInvokeStatic(loadFunction, inputs, backend.nonNullType,
+                             targetCanThrow: false));
     } else {
       throw "Unknown foreign: ${selector}";
     }