AudioConverter: Express delay in frames rather than msec.

media/base/fake_audio_render_callback.cc

Index: media/base/fake_audio_render_callback.cc
diff --git a/media/base/fake_audio_render_callback.cc b/media/base/fake_audio_render_callback.cc
index 8d7ef20a8602319cecb4161723de102ea4921f5b..fb686c56c14f05e0ce34da32602c1039eb005522 100644
--- a/media/base/fake_audio_render_callback.cc
+++ b/media/base/fake_audio_render_callback.cc
@@ -14,7 +14,7 @@ namespace media {
 FakeAudioRenderCallback::FakeAudioRenderCallback(double step)
     : half_fill_(false),
       step_(step),
-      last_audio_delay_milliseconds_(-1),
+      last_frames_delayed_(-1),
       last_channel_count_(-1),
       volume_(1) {
   reset();
@@ -23,9 +23,11 @@ FakeAudioRenderCallback::FakeAudioRenderCallback(double step)
 FakeAudioRenderCallback::~FakeAudioRenderCallback() {}
 
 int FakeAudioRenderCallback::Render(AudioBus* audio_bus,
-                                    uint32_t audio_delay_milliseconds,
+                                    uint32_t frames_delayed,
                                     uint32_t frames_skipped) {
-  last_audio_delay_milliseconds_ = audio_delay_milliseconds;
+  DCHECK_LE(frames_delayed, static_cast<uint32_t>(INT_MAX));
+  last_frames_delayed_ = static_cast<int>(frames_delayed);
+
   last_channel_count_ = audio_bus->channels();
 
   int number_of_frames = audio_bus->frames();
@@ -46,8 +48,8 @@ int FakeAudioRenderCallback::Render(AudioBus* audio_bus,
 }
 
 double FakeAudioRenderCallback::ProvideInput(AudioBus* audio_bus,
-                                             base::TimeDelta buffer_delay) {
-  Render(audio_bus, buffer_delay.InMillisecondsF() + 0.5, 0);
+                                             uint32_t frames_delayed) {
+  Render(audio_bus, frames_delayed, 0);
   return volume_;
 }