Make AudioParameters a class instead of a struct

content/browser/renderer_host/media/audio_renderer_host_unittest.cc

 // Copyright (c) 2012 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 "base/bind.h"
 #include "base/environment.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "base/process_util.h"
 #include "base/sync_socket.h"
@@ skipping 179 matching lines @@
 
   void Create() {
     EXPECT_CALL(*observer_,
                 OnSetAudioStreamStatus(_, kStreamId, "created"));
 
     InSequence s;
     // We will first receive an OnStreamCreated() signal.
     EXPECT_CALL(*host_, OnStreamCreated(kStreamId, _))
         .WillOnce(QuitMessageLoop(message_loop_.get()));
 
-    AudioParameters params;
+    AudioParameters::Format format;
     if (mock_stream_)
-      params.format = AudioParameters::AUDIO_MOCK;
+      format = AudioParameters::AUDIO_MOCK;
     else
-      params.format = AudioParameters::AUDIO_PCM_LINEAR;
-    params.channels = 2;
-    params.sample_rate = AudioParameters::kAudioCDSampleRate;
-    params.bits_per_sample = 16;
-    params.samples_per_packet = AudioParameters::kAudioCDSampleRate / 10;
+      format = AudioParameters::AUDIO_PCM_LINEAR;
+
+    AudioParameters params(format, CHANNEL_LAYOUT_STEREO,
+                           AudioParameters::kAudioCDSampleRate, 16,
+                           AudioParameters::kAudioCDSampleRate / 10);
 
     // Send a create stream message to the audio output stream and wait until
     // we receive the created message.
     host_->OnCreateStream(kStreamId, params);
     message_loop_->Run();
   }
 
   void Close() {
     EXPECT_CALL(*observer_,
                 OnSetAudioStreamStatus(_, kStreamId, "closed"));
@@ skipping 186 matching lines @@
     EnableRealDevice();
 
   Create();
   Play();
   SimulateError();
   Close();
 }
 
 
 // TODO(hclam): Add tests for data conversation in low latency mode.