Refactoring AudioDirectiveHandler to support testing

components/copresence/handlers/directive_handler.cc

 // 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.
 
 #include "components/copresence/handlers/directive_handler.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/time/time.h"
-#include "components/copresence/handlers/audio/audio_directive_handler.h"
+#include "components/copresence/handlers/audio/audio_directive_handler_impl.h"
 #include "components/copresence/proto/data.pb.h"
 
 namespace copresence {
 
 // Public functions
 
 DirectiveHandler::DirectiveHandler()
-  : audio_handler_(new AudioDirectiveHandler),
+  : audio_handler_(new AudioDirectiveHandlerImpl),
     whispernet_client_(nullptr) {}
 
 DirectiveHandler::~DirectiveHandler() {}
 
 void DirectiveHandler::Start(WhispernetClient* whispernet_client) {
   DCHECK(whispernet_client);
   whispernet_client_ = whispernet_client;
 
   // TODO(ckehoe): Just pass Whispernet all the way down to the AudioManager.
   //               We shouldn't be concerned with these details here.
@@ skipping 74 matching lines @@
   DCHECK(type == AUDIBLE || type == INAUDIBLE);
   // TODO(ckehoe): This null check shouldn't be necessary.
   // It's only here for tests.
   if (whispernet_client_) {
     whispernet_client_->RegisterSamplesCallback(samples_callback);
     whispernet_client_->EncodeToken(token, type);
   }
 }
 
 }  // namespace copresence