media::SilentSinkSuspender should simulate |delay| and |delay_timestamp|

media/base/audio_bus_perftest.cc

 // Copyright 2013 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 <stdint.h>
 #include <memory>
 
 #include "base/time/time.h"
 #include "media/base/audio_bus.h"
 #include "media/base/fake_audio_render_callback.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/perf/perf_test.h"
 
 namespace media {
 
 static const int kBenchmarkIterations = 20;
+static const int kSampleRate = 48000;
 
 template <typename T>
 void RunInterleaveBench(AudioBus* bus, const std::string& trace_name) {
   const int frame_size = bus->frames() * bus->channels();
   std::unique_ptr<T[]> interleaved(new T[frame_size]);
   const int byte_size = sizeof(T);
 
   base::TimeTicks start = base::TimeTicks::Now();
   for (int i = 0; i < kBenchmarkIterations; ++i) {
     bus->ToInterleaved(bus->frames(), byte_size, interleaved.get());
@@ skipping 10 matching lines @@
   }
   total_time_milliseconds =
       (base::TimeTicks::Now() - start).InMillisecondsF();
   perf_test::PrintResult(
       "audio_bus_from_interleaved", "", trace_name,
       total_time_milliseconds / kBenchmarkIterations, "ms", true);
 }
 
 // Benchmark the FromInterleaved() and ToInterleaved() methods.
 TEST(AudioBusPerfTest, Interleave) {
-  std::unique_ptr<AudioBus> bus = AudioBus::Create(2, 48000 * 120);
-  FakeAudioRenderCallback callback(0.2);
+  std::unique_ptr<AudioBus> bus = AudioBus::Create(2, kSampleRate * 120);
+  FakeAudioRenderCallback callback(0.2, kSampleRate);
   callback.Render(base::TimeDelta(), base::TimeTicks::Now(), 0, bus.get());
 
   RunInterleaveBench<int8_t>(bus.get(), "int8_t");
   RunInterleaveBench<int16_t>(bus.get(), "int16_t");
   RunInterleaveBench<int32_t>(bus.get(), "int32_t");
 }
 
 } // namespace media