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

extensions/renderer/dispatcher.cc

Index: extensions/renderer/dispatcher.cc
diff --git a/extensions/renderer/dispatcher.cc b/extensions/renderer/dispatcher.cc
index 6522034fa41381c5a4565b6aa3e3c9455d79b313..f594b193cd1e7c84de0bf203d49e28f5a843bcae 100644
--- a/extensions/renderer/dispatcher.cc
+++ b/extensions/renderer/dispatcher.cc
@@ -574,9 +574,17 @@ std::vector<std::pair<std::string, int> > Dispatcher::GetJsResources() {
       std::make_pair(mojo::kUnicodeModuleName, IDR_MOJO_UNICODE_JS));
   resources.push_back(
       std::make_pair(mojo::kValidatorModuleName, IDR_MOJO_VALIDATOR_JS));
+  resources.push_back(std::make_pair("async_waiter", IDR_ASYNC_WAITER_JS));
+  resources.push_back(std::make_pair("data_receiver", IDR_DATA_RECEIVER_JS));
+  resources.push_back(std::make_pair("data_sender", IDR_DATA_SENDER_JS));
   resources.push_back(std::make_pair("keep_alive", IDR_KEEP_ALIVE_JS));
   resources.push_back(std::make_pair("extensions/common/mojo/keep_alive.mojom",
                                      IDR_KEEP_ALIVE_MOJOM_JS));
+  resources.push_back(std::make_pair("device/serial/data_stream.mojom",
+                                     IDR_DATA_STREAM_MOJOM_JS));
+  resources.push_back(
+      std::make_pair("device/serial/data_stream_serialization.mojom",
+                     IDR_DATA_STREAM_SERIALIZATION_MOJOM_JS));
 
   // Custom bindings.
   resources.push_back(
@@ -601,6 +609,17 @@ std::vector<std::pair<std::string, int> > Dispatcher::GetJsResources() {
                      IDR_WEB_VIEW_REQUEST_CUSTOM_BINDINGS_JS));
   resources.push_back(std::make_pair("binding", IDR_BINDING_JS));
 
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableMojoSerialService)) {
+    resources.push_back(
+        std::make_pair("serial", IDR_SERIAL_CUSTOM_BINDINGS_JS));
+  }
+  resources.push_back(std::make_pair("serial_service", IDR_SERIAL_SERVICE_JS));
+  resources.push_back(
+      std::make_pair("device/serial/serial.mojom", IDR_SERIAL_MOJOM_JS));
+  resources.push_back(std::make_pair("device/serial/serial_serialization.mojom",
+                                     IDR_SERIAL_SERIALIZATION_MOJOM_JS));
+
   // Custom types sources.
   resources.push_back(std::make_pair("StorageArea", IDR_STORAGE_AREA_JS));