Add the whispernet proxy.

chrome/browser/copresence/chrome_whispernet_client.h

+// Copyright 2014 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_COPRESENCE_CHROME_WHISPERNET_CLIENT_H_
+#define CHROME_BROWSER_COPRESENCE_CHROME_WHISPERNET_CLIENT_H_
+
+#include <string>
+#include <vector>
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"

[xiyuan, 2014/07/31 19:22:22]

nit: not used.

[rkc, 2014/07/31 23:12:52]

Done.

+#include "components/copresence/public/whispernet_client.h"
+
+namespace content {
+class BrowserContext;
+}
+
+namespace extensions {
+namespace api {
+namespace copresence_private {
+struct AudioParameters;
+}
+}
+}
+
+namespace media {
+class AudioBusRefCounted;
+}
+
+// This class is responsible for communication with our ledger_proxy extension
+// that talks to the whispernet audio library.
+class ChromeWhispernetClient : public copresence::WhispernetClient {
+ public:
+  // The browser context needs to outlive this class.
+  explicit ChromeWhispernetClient(content::BrowserContext* browser_context);
+
+  // WhispernetClient overrides:

[xiyuan, 2014/07/31 19:22:22]

nit: move this down to just before "Initialize"

[rkc, 2014/07/31 23:12:52]

Done.

+
+  virtual ~ChromeWhispernetClient() OVERRIDE;

[xiyuan, 2014/07/31 19:22:22]

I don't think we need OVERRIDE for virtual dtor.

[rkc, 2014/07/31 23:12:52]

Done.

+
+  virtual void Initialize(const SuccessCallback& init_callback) OVERRIDE;
+  virtual void Shutdown() OVERRIDE;
+
+  virtual void EncodeToken(const std::string& token) OVERRIDE;
+  virtual void DecodeSamples(const std::string& samples) OVERRIDE;
+  virtual void DetectBroadcast() OVERRIDE;
+
+  virtual void RegisterTokensCallback(
+      const TokensCallback& tokens_callback) OVERRIDE;
+  virtual void RegisterSamplesCallback(
+      const SamplesCallback& samples_callback) OVERRIDE;
+  virtual void RegisterDetectBroadcastCallback(
+      const SuccessCallback& db_callback) OVERRIDE;
+
+  virtual TokensCallback GetTokensCallback() OVERRIDE;
+  virtual SamplesCallback GetSamplesCallback() OVERRIDE;
+  virtual SuccessCallback GetDetectBroadcastCallback() OVERRIDE;
+  virtual SuccessCallback GetInitializedCallback() OVERRIDE;
+
+  static const char kWhispernetProxyExtensionId[];
+
+ private:
+  // Fire an event to initialize whispernet with the given parameters.
+  void InitializeWhispernet(
+      const extensions::api::copresence_private::AudioParameters& params);
+
+  // This gets called twice; once when the proxy extension loads, the second
+  // time when we have initialized the proxy extension's encoder and decoder.
+  void OnExtensionLoaded(bool success);
+
+  content::BrowserContext* browser_context_;
+
+  SuccessCallback extension_loaded_callback_;
+  SuccessCallback init_callback_;
+
+  TokensCallback tokens_callback_;
+  SamplesCallback samples_callback_;
+  SuccessCallback db_callback_;
+
+  bool extension_loaded_;
+
+  DISALLOW_COPY_AND_ASSIGN(ChromeWhispernetClient);
+};
+
+#endif  // CHROME_BROWSER_COPRESENCE_CHROME_WHISPERNET_CLIENT_H_