[Interpreter] Support top-level code.

src/interpreter/bytecode-generator.cc

Index: src/interpreter/bytecode-generator.cc
diff --git a/src/interpreter/bytecode-generator.cc b/src/interpreter/bytecode-generator.cc
index df9f21cb8529556672d6f84d50d2ffe69200aeb8..765db2ce4884bdf91f65cfea9b8a5fd6dc254e12 100644
--- a/src/interpreter/bytecode-generator.cc
+++ b/src/interpreter/bytecode-generator.cc
@@ -105,9 +105,6 @@ Handle<BytecodeArray> BytecodeGenerator::MakeBytecode(CompilationInfo* info) {
   set_info(info);
   set_scope(info->scope());
 
-  // This a temporary guard (oth).
-  DCHECK(scope()->is_function_scope());
-
   builder()->set_parameter_count(info->num_parameters_including_this());
   builder()->set_locals_count(scope()->num_stack_slots());