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 e22dfe14f3b9c243dfb0197714baaf9769211d13..65dc0abb19088ba49110410f696f8f3f9f97cf9a 100644
--- a/dart/sdk/lib/_internal/compiler/implementation/ssa/builder.dart
+++ b/dart/sdk/lib/_internal/compiler/implementation/ssa/builder.dart
@@ -1071,6 +1071,12 @@ 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;