[generators] Implement Generator.prototype.return.

src/full-codegen/full-codegen.cc

Index: src/full-codegen/full-codegen.cc
diff --git a/src/full-codegen/full-codegen.cc b/src/full-codegen/full-codegen.cc
index 27a168156529b9fa6b72430f0b47ef22a43f2161..4b1a552391566a3d27fdd65895fd1299e41cfb61 100644
--- a/src/full-codegen/full-codegen.cc
+++ b/src/full-codegen/full-codegen.cc
@@ -633,6 +633,13 @@ void FullCodeGenerator::EmitGeneratorNext(CallRuntime* expr) {
 }
 
 
+void FullCodeGenerator::EmitGeneratorReturn(CallRuntime* expr) {
+  ZoneList<Expression*>* args = expr->arguments();
+  DCHECK(args->length() == 2);
+  EmitGeneratorResume(args->at(0), args->at(1), JSGeneratorObject::RETURN);
+}
+
+
 void FullCodeGenerator::EmitGeneratorThrow(CallRuntime* expr) {
   ZoneList<Expression*>* args = expr->arguments();
   DCHECK(args->length() == 2);