Add support for midstream audio configuration changes.

media/filters/pipeline_integration_test_base.cc

Index: media/filters/pipeline_integration_test_base.cc
diff --git a/media/filters/pipeline_integration_test_base.cc b/media/filters/pipeline_integration_test_base.cc
index 8dce18cc493ab2d5b2752158146b6fea7e35f38f..9dc8aecab12043d6401908908a55ab93ffefe7e6 100644
--- a/media/filters/pipeline_integration_test_base.cc
+++ b/media/filters/pipeline_integration_test_base.cc
@@ -32,7 +32,8 @@ PipelineIntegrationTestBase::PipelineIntegrationTestBase()
                              new MediaLog())),
       ended_(false),
       pipeline_status_(PIPELINE_OK),
-      last_video_frame_format_(VideoFrame::UNKNOWN) {
+      last_video_frame_format_(VideoFrame::UNKNOWN),
+      hardware_config_(AudioParameters(), AudioParameters()) {
   base::MD5Init(&md5_context_);
   EXPECT_CALL(*this, OnSetOpaque(true)).Times(AnyNumber());
 }
@@ -265,6 +266,13 @@ PipelineIntegrationTestBase::CreateFilterCollection(
   audio_decoders.push_back(
       new OpusAudioDecoder(message_loop_.message_loop_proxy()));
 
+  AudioParameters out_params(AudioParameters::AUDIO_PCM_LOW_LATENCY,
+                             CHANNEL_LAYOUT_STEREO,
+                             44100,
+                             16,
+                             512);
+  hardware_config_.UpdateOutputConfig(out_params);
+
   AudioRendererImpl* audio_renderer_impl = new AudioRendererImpl(
       message_loop_.message_loop_proxy(),
       (clockless_playback_)
@@ -273,7 +281,8 @@ PipelineIntegrationTestBase::CreateFilterCollection(
       audio_decoders.Pass(),
       base::Bind(&PipelineIntegrationTestBase::SetDecryptor,
                  base::Unretained(this),
-                 decryptor));
+                 decryptor),
+      hardware_config_);
   // Disable underflow if hashing is enabled.
   if (hashing_enabled_) {
     audio_sink_->StartAudioHashForTesting();