Make more media APIs aware of |delay| and |delay_timestamp|

media/audio/audio_device_thread.h

Index: media/audio/audio_device_thread.h
diff --git a/media/audio/audio_device_thread.h b/media/audio/audio_device_thread.h
index f3287ef39ccf86705642dc5439f7b13860737f1d..43cc160836a1e30598fa677d58560b62486d8d6d 100644
--- a/media/audio/audio_device_thread.h
+++ b/media/audio/audio_device_thread.h
@@ -42,7 +42,8 @@ class MEDIA_EXPORT AudioDeviceThread : public base::PlatformThread::Delegate {
     virtual void MapSharedMemory() = 0;
 
     // Called whenever we receive notifications about pending input data.
-    virtual void Process(uint32_t pending_data) = 0;
+    virtual void Process(int64_t pending_data,

[chcunningham, 2016/10/21 18:19:47]

Can you use a TimeDelta in this signature (and calling it delay and
delay_timestamp like we do browser side).

[Mikhail, 2016/10/24 19:50:24]

The reason for the current naming is that AudioInputDevice is using it in a
different way (pls see AudioInputDevice::AudioThreadCallback::Process):
|pending_data| contains shmem segment there, so I had to keep naming generic.

+                         base::TimeTicks data_timestamp) = 0;
 
    protected:
     virtual ~Callback();
@@ -75,6 +76,12 @@ class MEDIA_EXPORT AudioDeviceThread : public base::PlatformThread::Delegate {
   // synchronous process and the thread will stop before the method returns.
   ~AudioDeviceThread() override;
 
+  // Represents a data packet to be received via the socket.
+  struct Packet {
+    int64_t pending_data;

[chcunningham, 2016/10/21 18:19:47]

Can you name these like you do browser side? 

delay;
delay_timestamp;

[Mikhail, 2016/10/24 19:50:24]

Same motivation as in the comment above.

+    int64_t data_timestamp_us;
+  };
+
  private:
   void ThreadMain() final;