Fix host-checked mode failures.

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

Index: sdk/lib/_internal/compiler/implementation/ssa/codegen.dart
===================================================================
--- sdk/lib/_internal/compiler/implementation/ssa/codegen.dart	(revision 15084)
+++ sdk/lib/_internal/compiler/implementation/ssa/codegen.dart	(working copy)
@@ -373,6 +373,9 @@
     variableNames = allocator.names;
     shouldGroupVarDeclarations = allocator.names.numberOfVariables > 1;
 
+    // Don't register a return type for lazily initialized variables.

[Søren Gjesse, 2012/11/20 08:40:27]

Maybe assert that work.element is either FunctionElement or xxx (whatever type a
lazily initialized variable is).

+    if (work.element is! FunctionElement) return;
+
     // Register return types to the backend.
     graph.exit.predecessors.forEach((HBasicBlock block) {
       HInstruction last = block.last;