Switch browser side audio capture path to use base time primitives.

media/audio/mac/audio_input_mac.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 "media/audio/mac/audio_input_mac.h"
 
 #include <CoreServices/CoreServices.h>
 
 #include "base/logging.h"
 #include "base/mac/mac_logging.h"
@@ skipping 214 matching lines @@
     if (elapsed < kMinDelay) {
       TRACE_EVENT0("audio",
                    "PCMQueueInAudioInputStream::HandleInputBuffer sleep");
       base::PlatformThread::Sleep(kMinDelay - elapsed);
     }
 
     uint8_t* audio_data = reinterpret_cast<uint8_t*>(audio_buffer->mAudioData);
     audio_bus_->FromInterleaved(
         audio_data, audio_bus_->frames(), format_.mBitsPerChannel / 8);
     callback_->OnData(
-        this, audio_bus_.get(), audio_buffer->mAudioDataByteSize, 0.0);
+        this, audio_bus_.get(),
+        base::TimeDelta::FromSecondsD(
+            audio_buffer->mAudioDataByteSize /
+            static_cast<double>(format_.mBytesPerFrame * format_.mSampleRate)),
+        base::TimeTicks::Now(), 0.0);
 
     last_fill_ = base::TimeTicks::Now();
   }
   // Recycle the buffer.
   OSStatus err = QueueNextBuffer(audio_buffer);
   if (err != noErr) {
     if (err == kAudioQueueErr_EnqueueDuringReset) {
       // This is the error you get if you try to enqueue a buffer and the
       // queue has been closed. Not really a problem if indeed the queue
       // has been closed.
       // TODO(joth): PCMQueueOutAudioOutputStream uses callback_ to provide an
       // extra guard for this situation, but it seems to introduce more
       // complications than it solves (memory barrier issues accessing it from
       // multiple threads, looses the means to indicate OnClosed to client).
       // Should determine if we need to do something equivalent here.
       return;
     }
     HandleError(err);
   }
 }
 
 }  // namespace media