Refactor AudioParameters member setting.

media/audio/win/audio_low_latency_input_win_unittest.cc

Index: media/audio/win/audio_low_latency_input_win_unittest.cc
diff --git a/media/audio/win/audio_low_latency_input_win_unittest.cc b/media/audio/win/audio_low_latency_input_win_unittest.cc
index 902b03f15f33502fe909a40393997a7ccc332b27..0b8aa871203d173d87df34e22510ee7aafe4d1c3 100644
--- a/media/audio/win/audio_low_latency_input_win_unittest.cc
+++ b/media/audio/win/audio_low_latency_input_win_unittest.cc
@@ -193,11 +193,10 @@ class AudioInputStreamWrapper {
 
  private:
   AudioInputStream* CreateInputStream() {
+    AudioParameters params = default_params_;
+    params.set_frames_per_buffer(frames_per_buffer_);
     AudioInputStream* ais = audio_man_->MakeAudioInputStream(
-        AudioParameters(format(), default_params_.channel_layout(),
-                        sample_rate(), bits_per_sample(), frames_per_buffer_,
-                        default_params_.effects()),
-        AudioManagerBase::kDefaultDeviceId);
+        params, AudioManagerBase::kDefaultDeviceId);
     EXPECT_TRUE(ais);
     return ais;
   }