Refactor AudioParameters member setting.

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/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/run_loop.h"
 #include "base/sync_socket.h"
 #include "content/browser/media/capture/audio_mirroring_manager.h"
@@ skipping 199 matching lines @@
  protected:
   void Create(bool unified_stream) {
     EXPECT_CALL(*host_.get(), OnStreamCreated(kStreamId, _));
 
     EXPECT_CALL(mirroring_manager_,
                 AddDiverter(kRenderProcessId, kRenderFrameId, NotNull()))
         .RetiresOnSaturation();
 
     // Send a create stream message to the audio output stream and wait until
     // we receive the created message.
-    int session_id;
-    media::AudioParameters params;
+    media::AudioParameters params(
+        media::AudioParameters::AUDIO_FAKE, media::CHANNEL_LAYOUT_STEREO,
+        media::AudioParameters::kAudioCDSampleRate, 16,
+        media::AudioParameters::kAudioCDSampleRate / 10);
+    int session_id = 0;
     if (unified_stream) {
       // Use AudioInputDeviceManager::kFakeOpenSessionId as the session id to
       // pass the permission check.
       session_id = AudioInputDeviceManager::kFakeOpenSessionId;
-      params = media::AudioParameters(
-          media::AudioParameters::AUDIO_FAKE,
-          media::CHANNEL_LAYOUT_STEREO,
-          media::AudioParameters::kAudioCDSampleRate, 16,
-          media::AudioParameters::kAudioCDSampleRate / 10,
-          media::AudioParameters::NO_EFFECTS);
-    } else {
-      session_id = 0;
-      params = media::AudioParameters(
-          media::AudioParameters::AUDIO_FAKE,
-          media::CHANNEL_LAYOUT_STEREO,
-          media::AudioParameters::kAudioCDSampleRate, 16,
-          media::AudioParameters::kAudioCDSampleRate / 10);
     }
     host_->OnCreateStream(kStreamId, kRenderFrameId, session_id, params);
 
     // At some point in the future, a corresponding RemoveDiverter() call must
     // be made.
     EXPECT_CALL(mirroring_manager_, RemoveDiverter(NotNull()))
         .RetiresOnSaturation();
     SyncWithAudioThread();
   }
 
@@ skipping 154 matching lines @@
 }
 
 TEST_F(AudioRendererHostTest, CreateUnifiedStreamAndClose) {
   Create(true);
   Close();
 }
 
 // TODO(hclam): Add tests for data conversation in low latency mode.
 
 }  // namespace content