Refactor AudioParameters member setting.

content/browser/renderer_host/media/audio_input_renderer_host.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 "content/browser/renderer_host/media/audio_input_renderer_host.h"
 
 #include "base/bind.h"
 #include "base/memory/shared_memory.h"
 #include "base/metrics/histogram.h"
 #include "base/numerics/safe_math.h"
@@ skipping 297 matching lines @@
   DCHECK_GT(render_frame_id, 0);
 
   // media::AudioParameters is validated in the deserializer.
   if (LookupById(stream_id) != NULL) {
     SendErrorMessage(stream_id, STREAM_ALREADY_EXISTS);
     MaybeUnregisterKeyboardMicStream(config);
     return;
   }
 
   media::AudioParameters audio_params(config.params);
-  if (media_stream_manager_->audio_input_device_manager()->
-      ShouldUseFakeDevice()) {
-    audio_params.Reset(
-        media::AudioParameters::AUDIO_FAKE,
-        config.params.channel_layout(), config.params.channels(),
-        config.params.sample_rate(), config.params.bits_per_sample(),
-        config.params.frames_per_buffer());
-  }
+  if (media_stream_manager_->audio_input_device_manager()
+          ->ShouldUseFakeDevice())
+    audio_params.set_format(media::AudioParameters::AUDIO_FAKE);
 
   // Check if we have the permission to open the device and which device to use.
   std::string device_name;
   std::string device_id = media::AudioManagerBase::kDefaultDeviceId;
   if (audio_params.format() != media::AudioParameters::AUDIO_FAKE) {
     const StreamDeviceInfo* info = media_stream_manager_->
         audio_input_device_manager()->GetOpenedDeviceInfoById(session_id);
     if (!info) {
       SendErrorMessage(stream_id, PERMISSION_DENIED);
       DLOG(WARNING) << "No permission has been granted to input stream with "
@@ skipping 214 matching lines @@
 #if defined(OS_CHROMEOS)
   if (config.params.channel_layout() ==
       media::CHANNEL_LAYOUT_STEREO_AND_KEYBOARD_MIC) {
     media_stream_manager_->audio_input_device_manager()
         ->UnregisterKeyboardMicStream();
   }
 #endif
 }
 
 }  // namespace content