Deferred (aka lazy) loading of static functions.

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

Index: dart/sdk/lib/_internal/compiler/implementation/ssa/builder.dart
diff --git a/dart/sdk/lib/_internal/compiler/implementation/ssa/builder.dart b/dart/sdk/lib/_internal/compiler/implementation/ssa/builder.dart
index 6d6000fb985e0ec6cff93984ea53cd956c5ffaa5..c7a74bbd80bc54bcfd37bdbd5a7ca290d02ac855 100644
--- a/dart/sdk/lib/_internal/compiler/implementation/ssa/builder.dart
+++ b/dart/sdk/lib/_internal/compiler/implementation/ssa/builder.dart
@@ -1079,6 +1079,12 @@ class SsaBuilder extends ResolvedVisitor implements Visitor {
                        Selector selector,
                        Link<Node> arguments,
                        Node currentNode) {
+    // We cannot inline a method from a deferred library into a method
+    // which isn't deferred.
+    // TODO(ahe): But we should still inline into the same
+    // connected-component of the deferred library.
+    if (compiler.deferredLoadTask.isDeferred(element)) return false;
+
     if (compiler.disableInlining) return false;
     // Ensure that [element] is an implementation element.
     element = element.implementation;