Allow audio system to handle synchronized low-latency audio I/O

media/audio/audio_low_latency_input_output_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/basictypes.h"
 #include "base/environment.h"
 #include "base/file_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "base/path_service.h"
@@ skipping 238 matching lines @@
       EXPECT_EQ(static_cast<size_t>(size) % sizeof(*audio_bus->channel(0)), 0U);
       audio_bus->FromInterleaved(
           source, size / frame_size_, frame_size_ / channels_);
       buffer_->Seek(size);
       return size / frame_size_;
     }
 
     return 0;
   }
 
+  virtual int OnMoreIOData(AudioBus* source,
+                           AudioBus* dest,
+                           AudioBuffersState buffers_state) OVERRIDE {
+    NOTREACHED();
+    return 0;
+  }
+
   virtual void OnError(AudioOutputStream* stream, int code) OVERRIDE {}
   virtual void WaitTillDataReady() OVERRIDE {}
 
  protected:
   // Converts from bytes to milliseconds taking the sample rate and size
   // of an audio frame into account.
   int BytesToMilliseconds(uint32 delay_bytes) const {
     return static_cast<int>((delay_bytes / frame_size_) * frames_to_ms_ + 0.5);
   }
 
@@ skipping 191 matching lines @@
 
   // All Close() operations that run on the mocked audio thread,
   // should be synchronous and not post additional close tasks to
   // mocked the audio thread. Hence, there is no need to call
   // message_loop()->RunAllPending() after the Close() methods.
   aos->Close();
   ais->Close();
 }
 
 }  // namespace media