arc: Use incognito profile for OptIn and cookie fetcher

chrome/browser/extensions/api/messaging/arc_support_host.h

Index: chrome/browser/extensions/api/messaging/arc_support_host.h
diff --git a/chrome/browser/extensions/api/messaging/arc_support_host.h b/chrome/browser/extensions/api/messaging/arc_support_host.h
new file mode 100644
index 0000000000000000000000000000000000000000..84190de28d2d6005b174e6eeeae39f3212fe8c1b
--- /dev/null
+++ b/chrome/browser/extensions/api/messaging/arc_support_host.h
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+// 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.
+
+#ifndef CHROME_BROWSER_EXTENSIONS_API_MESSAGING_ARC_SUPPORT_HOST_H_
+#define CHROME_BROWSER_EXTENSIONS_API_MESSAGING_ARC_SUPPORT_HOST_H_
+
+#include "base/macros.h"
+#include "chrome/browser/chromeos/arc/arc_auth_service.h"
+#include "extensions/browser/api/messaging/native_message_host.h"
+
+// Supports communication with Arc support dialog.
+class ArcSupportHost : public extensions::NativeMessageHost,
+                       public arc::ArcAuthService::Observer {
+ public:
+  static const char kHostName[];
+  static const char* const kHostOrigin[];
+
+  static scoped_ptr<NativeMessageHost> Create();
+
+  ~ArcSupportHost() override;
+
+  // Overrides NativeMessageHost:
+  void Start(Client* client) override;
+  void OnMessage(const std::string& request_string) override;
+  scoped_refptr<base::SingleThreadTaskRunner> task_runner() const override;
+
+  // Overrides arc::ArcAuthService::Observer:
+  void OnOptInUINeedToClose() override;
+
+ private:
+  // Unowned pointer.
+  Client* client_ = nullptr;
+
+  ArcSupportHost();
+
+  DISALLOW_COPY_AND_ASSIGN(ArcSupportHost);
+};
+
+#endif  // CHROME_BROWSER_EXTENSIONS_API_MESSAGING_ARC_SUPPORT_HOST_H_