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/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 {
 
 DirectiveHandler::DirectiveHandler() {}
 
 void DirectiveHandler::Initialize(
     const AudioManager::DecodeSamplesCallback& decode_cb,
     const AudioManager::EncodeTokenCallback& encode_cb) {
-  audio_handler_.reset(new AudioDirectiveHandler());
+  audio_handler_.reset(new AudioDirectiveHandlerImpl);
   audio_handler_->Initialize(decode_cb, encode_cb);
 }
 
 DirectiveHandler::~DirectiveHandler() {
 }
 
 void DirectiveHandler::AddDirective(const Directive& directive) {
   // We only handle Token directives; wifi/ble requests aren't implemented.
   DCHECK_EQ(directive.instruction_type(), TOKEN);
 
@@ skipping 22 matching lines @@
   DCHECK(audio_handler_.get()) << "Clients must call Initialize() before "
                                << "any other DirectiveHandler methods.";
   audio_handler_->RemoveInstructions(op_id);
 }
 
 const std::string DirectiveHandler::GetCurrentAudioToken(AudioType type) const {
   return audio_handler_->PlayingToken(type);
 }
 
 }  // namespace copresence