Allowing WhispernetClient to be used during initialization

components/copresence/handlers/directive_handler.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 COMPONENTS_COPRESENCE_HANDLERS_DIRECTIVE_HANDLER_H_
 #define COMPONENTS_COPRESENCE_HANDLERS_DIRECTIVE_HANDLER_H_
 
 #include <string>
 
 #include "base/macros.h"
 #include "components/copresence/public/copresence_constants.h"
 
 namespace copresence {
 
 class Directive;
 class WhispernetClient;
 
 // The directive handler manages transmit and receive directives.
 class DirectiveHandler {
  public:
   DirectiveHandler() {}
   virtual ~DirectiveHandler() {}
 
   // Starts processing directives with the provided Whispernet client.
   // Directives will be queued until this function is called.
   // |whispernet_client| is owned by the caller and must outlive the
   // DirectiveHandler.
   // |tokens_cb| is called for all audio tokens found in recorded audio.
+  // TODO(ckehoe): This is no longer needed. Merge into the constructor.
   virtual void Start(WhispernetClient* whispernet_client,
                      const TokensCallback& tokens_cb) = 0;
 
   // Adds a directive to handle.
   virtual void AddDirective(const Directive& directive) = 0;
 
   // Removes any directives associated with the given operation id.
   virtual void RemoveDirectives(const std::string& op_id) = 0;
 
   // TODO(rkc): Too many audio specific functions here.
   // Find a better way to get this information to the copresence manager.
   virtual const std::string GetCurrentAudioToken(AudioType type) const = 0;
   virtual bool IsAudioTokenHeard(AudioType type) const = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(DirectiveHandler);
 };
 
 }  // namespace copresence
 
 #endif  // COMPONENTS_COPRESENCE_HANDLERS_DIRECTIVE_HANDLER_H_