[Interpreter] Add native function literal support.

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 37cd938a15dacfe65548c79fa4713a83298fc46e..ebfdf33c581585628e491e43102b366e18f6ea77 100644
--- a/src/interpreter/bytecode-generator.cc
+++ b/src/interpreter/bytecode-generator.cc
@@ -1213,7 +1213,11 @@ void BytecodeGenerator::VisitClassLiteral(ClassLiteral* expr) {
 
 void BytecodeGenerator::VisitNativeFunctionLiteral(
     NativeFunctionLiteral* expr) {
-  UNIMPLEMENTED();
+  // Find or build a shared function info for the native function template.
+  Handle<SharedFunctionInfo> shared_info =
+      Compiler::GetSharedFunctionInfoForNative(expr->extension(), expr->name());
+  builder()->CreateClosure(shared_info, NOT_TENURED);
+  execution_result()->SetResultInAccumulator();
 }