Added a debug info UI for Blimp

blimp/net/blimp_connection_details.h

+// 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_NET_BLIMP_CONNECTION_DETAILS_H_
+#define BLIMP_NET_BLIMP_CONNECTION_DETAILS_H_
+
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "blimp/net/blimp_net_export.h"
+
+namespace blimp {
+
+/**
+ * Observer to be notified in the event of network activities. Observer methods
+ * are to be called on UI thread.
+ */
+class NetworkActivityObserver {
+ public:
+  virtual void UpdateDebugInfo(int received, int sent, int commits) = 0;
+};
+
+// Collects network traffic statistics. Maintains a counter for number of
+// completed commits, bytes sent and received over network and notifies its
+// observers on the main thread. Presents the data on a per navigation basis.
+// This class is supposed to live an entire session, created and destroyed along
+// it.
+class BLIMP_NET_EXPORT BlimpConnectionDetails {
+ public:
+  BlimpConnectionDetails(
+      base::WeakPtr<NetworkActivityObserver> observer,
+      const scoped_refptr<base::TaskRunner>& main_thread_task_runner,
+      const scoped_refptr<base::TaskRunner>& io_thread_task_runner);
+
+  ~BlimpConnectionDetails();
+
+  void EnableDebugInfo(bool enable);
+
+  // Called on the IO thread.
+  void OnPacketReceived(int bytes);
+
+  // Called on the IO thread.
+  void OnPacketSent(int bytes);
+
+  // Called on the main thread.
+  void OnCommit();
+
+  // Called on the main thread.
+  void ResetStats();
+
+ private:
+  void ResetStatsOnIOThread();
+
+  // Flag to show/hide the debug data on blimp view.
+  bool debug_info_enabled_;
+
+  // Total number of bytes sent/received during a navigation. Accessed on IO
+  // thread.
+  int bytes_received_;
+  int bytes_sent_;
+
+  // Total number of commits completed on the client. Accessed on main thread.
+  int commits_;
+
+  base::WeakPtr<NetworkActivityObserver> observer_;
+  scoped_refptr<base::TaskRunner> main_thread_task_runner_;
+  scoped_refptr<base::TaskRunner> io_thread_task_runner_;
+  base::WeakPtrFactory<BlimpConnectionDetails> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(BlimpConnectionDetails);
+};
+
+}  // namespace blimp
+
+#endif  // BLIMP_NET_BLIMP_CONNECTION_DETAILS_H_