Reland of Add browser tests for FetchEvent.request.mode/credentials in the service worker

chrome/test/data/nacl/pnacl_url_loader/pnacl_url_loader.cc

Index: chrome/test/data/nacl/pnacl_url_loader/pnacl_url_loader.cc
diff --git a/chrome/test/data/nacl/pnacl_url_loader/pnacl_url_loader.cc b/chrome/test/data/nacl/pnacl_url_loader/pnacl_url_loader.cc
new file mode 100644
index 0000000000000000000000000000000000000000..9ef656bf3ee492bd2f776fad4dd8705775fdf1bf
--- /dev/null
+++ b/chrome/test/data/nacl/pnacl_url_loader/pnacl_url_loader.cc
@@ -0,0 +1,60 @@
+// Copyright 2016 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 <string>
+
+#include "ppapi/cpp/instance.h"
+#include "ppapi/cpp/module.h"
+#include "ppapi/cpp/url_loader.h"
+#include "ppapi/cpp/url_request_info.h"
+#include "ppapi/cpp/url_response_info.h"
+#include "ppapi/cpp/var.h"
+#include "ppapi/utility/completion_callback_factory.h"
+
+class PnaclUrlLoaderInstance : public pp::Instance {
+ public:
+  explicit PnaclUrlLoaderInstance(PP_Instance instance)
+      : pp::Instance(instance), loader_(this), factory_(this) {}
+
+  void HandleMessage(const pp::Var& var_message) override {
+    if (var_message.is_string()) {
+      command_ = var_message.AsString();
+      pp::URLRequestInfo request(this);
+      request.SetMethod("GET");
+      if (command_.find("Other") != std::string::npos)
+        request.SetURL("https://www.example.com/echo");
+      else
+        request.SetURL("/echo");
+      if (command_.find("CORS") != std::string::npos)
+        request.SetAllowCrossOriginRequests(true);
+      if (command_.find("Credentials") != std::string::npos)
+        request.SetAllowCredentials(true);
+      loader_.Open(request,
+                   factory_.NewCallback(&PnaclUrlLoaderInstance::OnOpen));
+      return;
+    }
+  }
+
+ private:
+  void OnOpen(int32_t result) { PostMessage(pp::Var("OnOpen" + command_)); }
+
+  pp::URLLoader loader_;
+  pp::CompletionCallbackFactory<PnaclUrlLoaderInstance> factory_;
+  std::string command_;
+};
+
+class PnaclUrlLoaderModule : public pp::Module {
+ public:
+  virtual pp::Instance* CreateInstance(PP_Instance instance) {
+    return new PnaclUrlLoaderInstance(instance);
+  }
+};
+
+namespace pp {
+
+__attribute__((visibility("default"))) Module* CreateModule() {
+  return new PnaclUrlLoaderModule();
+}
+
+}  // namespace pp