Enable the mojo-based serial API in the renderer behind a flag.

extensions/renderer/api/serial/data_receiver_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <queue>
 
 #include "device/serial/data_source_sender.h"
 #include "device/serial/data_stream.mojom.h"
 #include "extensions/renderer/api_test_base.h"
 #include "grit/extensions_renderer_resources.h"
 
 namespace extensions {
 
 // Runs tests defined in extensions/test/data/data_receiver_unittest.js
 class DataReceiverTest : public ApiTestBase {
  public:
   DataReceiverTest() {}
 
   void SetUp() override {
     ApiTestBase::SetUp();
-    env()->RegisterModule("async_waiter", IDR_ASYNC_WAITER_JS);
-    env()->RegisterModule("data_receiver", IDR_DATA_RECEIVER_JS);
-    env()->RegisterModule("device/serial/data_stream.mojom",
-                          IDR_DATA_STREAM_MOJOM_JS);
-    env()->RegisterModule("device/serial/data_stream_serialization.mojom",
-                          IDR_DATA_STREAM_SERIALIZATION_MOJOM_JS);
     service_provider()->AddService(base::Bind(
         &DataReceiverTest::CreateDataSource, base::Unretained(this)));
   }
 
   void TearDown() override {
     if (sender_.get()) {
       sender_->ShutDown();
       sender_ = NULL;
     }
     ApiTestBase::TearDown();
@@ skipping 88 matching lines @@
   data_to_send_.push("a");
   RunTest("data_receiver_unittest.js", "testSerializeDuringReceive");
 }
 
 TEST_F(DataReceiverTest, SerializeAfterClose) {
   data_to_send_.push("a");
   RunTest("data_receiver_unittest.js", "testSerializeAfterClose");
 }
 
 }  // namespace extensions