Move more client network code to //blimp/client/core/session.

blimp/client/core/session/cross_thread_network_event_observer.h

Index: blimp/client/core/session/cross_thread_network_event_observer.h
diff --git a/blimp/client/core/session/cross_thread_network_event_observer.h b/blimp/client/core/session/cross_thread_network_event_observer.h
new file mode 100644
index 0000000000000000000000000000000000000000..77012e9da148f40349d16448c4e65f89fa74ff20
--- /dev/null
+++ b/blimp/client/core/session/cross_thread_network_event_observer.h
@@ -0,0 +1,42 @@
+// 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 BLIMP_CLIENT_CORE_SESSION_CROSS_THREAD_NETWORK_EVENT_OBSERVER_H_
+#define BLIMP_CLIENT_CORE_SESSION_CROSS_THREAD_NETWORK_EVENT_OBSERVER_H_
+
+#include <memory>
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/weak_ptr.h"
+#include "base/sequenced_task_runner.h"
+#include "blimp/client/core/session/network_event_observer.h"
+
+namespace blimp {
+namespace client {
+
+// Posts NetworkEvents to an observer across the IO/UI thread boundary.
+class CrossThreadNetworkEventObserver : public NetworkEventObserver {
+ public:
+  CrossThreadNetworkEventObserver(
+      const base::WeakPtr<NetworkEventObserver>& target,
+      const scoped_refptr<base::SequencedTaskRunner>& task_runner);
+
+  ~CrossThreadNetworkEventObserver() override;
+
+  // NetworkEventObserver implementation.
+  void OnConnected() override;
+  void OnDisconnected(int result) override;
+
+ private:
+  base::WeakPtr<NetworkEventObserver> target_;
+  scoped_refptr<base::SequencedTaskRunner> task_runner_;
+
+  DISALLOW_COPY_AND_ASSIGN(CrossThreadNetworkEventObserver);
+};
+
+}  // namespace client
+}  // namespace blimp
+
+#endif  // BLIMP_CLIENT_CORE_SESSION_CROSS_THREAD_NETWORK_EVENT_OBSERVER_H_