Move bulk of media::AudioRendererImpl::Render() logic to media thread.

media/filters/audio_renderer_impl_unittest.cc

Index: media/filters/audio_renderer_impl_unittest.cc
diff --git a/media/filters/audio_renderer_impl_unittest.cc b/media/filters/audio_renderer_impl_unittest.cc
index cb7626fe0c5b44cd30edcbd4f3ad5cf6b9767375..f216c1ba54ec3c68c035ecf43ea87371fa76d0a3 100644
--- a/media/filters/audio_renderer_impl_unittest.cc
+++ b/media/filters/audio_renderer_impl_unittest.cc
@@ -572,12 +572,14 @@ TEST_F(AudioRendererImplTest, Underflow) {
   // update.
   EXPECT_CALL(*this, OnBufferingStateChange(BUFFERING_HAVE_NOTHING));
   EXPECT_FALSE(ConsumeBufferedData(kDataSize, NULL));
+  base::RunLoop().RunUntilIdle();
 
   // Verify we're still not getting audio data.
   bool muted = false;
   EXPECT_EQ(0, frames_buffered());
   EXPECT_FALSE(ConsumeBufferedData(kDataSize, &muted));
   EXPECT_TRUE(muted);
+  base::RunLoop().RunUntilIdle();
 
   // Deliver enough data to have enough for buffering.
   EXPECT_CALL(*this, OnBufferingStateChange(BUFFERING_HAVE_ENOUGH));
@@ -602,6 +604,7 @@ TEST_F(AudioRendererImplTest, Underflow_CapacityResetsAfterFlush) {
   int initial_capacity = buffer_capacity();
   EXPECT_CALL(*this, OnBufferingStateChange(BUFFERING_HAVE_NOTHING));
   EXPECT_FALSE(ConsumeBufferedData(kDataSize, NULL));
+  base::RunLoop().RunUntilIdle();
 
   // Verify that the buffer capacity increased as a result of underflowing.
   EXPECT_GT(buffer_capacity(), initial_capacity);