dart2js cps: Introduce GetStatic/SetStatic.

pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.dart

Index: pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.dart
diff --git a/pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.dart b/pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.dart
index fbb348bdf1ea5f2e9f245bd60a710a79c4d880f2..c49953c554cb103e4f41957cc5154d9ba1429b18 100644
--- a/pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.dart
+++ b/pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.dart
@@ -771,7 +771,7 @@ abstract class IrBuilderVisitor extends ast.Visitor<ir.Primitive>
     if (function.isForeign(compiler.backend)) {
       return giveup(node, 'handleStaticFunctionGet: foreign: $function');
     }
-    return giveup(node, 'handleStaticFunctionGet: $function');
+    return irBuilder.buildStaticFunctionGet(function);
   }
 
   @override
@@ -3690,6 +3690,10 @@ class CleanupPass extends ir.RecursiveVisitor {
     node.body = replacementFor(node.body);
   }
 
+  processSetStatic(ir.SetStatic node) {
+    node.body = replacementFor(node.body);
+  }
+
   processContinuation(ir.Continuation node) {
     node.body = replacementFor(node.body);
   }