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

media/audio/audio_device_thread.cc

Index: media/audio/audio_device_thread.cc
diff --git a/media/audio/audio_device_thread.cc b/media/audio/audio_device_thread.cc
index c63a32b8f65d375162fe9960d1a502560957ac20..edbdbd89cedd42f32d83fed4999114c06b609255 100644
--- a/media/audio/audio_device_thread.cc
+++ b/media/audio/audio_device_thread.cc
@@ -67,12 +67,12 @@
 
   uint32_t buffer_index = 0;
   while (true) {
-    Packet packet = {0, 0};
-    size_t bytes_read = socket_.Receive(&packet, sizeof(packet));
-    if (bytes_read != sizeof(packet))
+    uint32_t pending_data = 0;
+    size_t bytes_read = socket_.Receive(&pending_data, sizeof(pending_data));
+    if (bytes_read != sizeof(pending_data))
       break;
 
-    // std::numeric_limits<int64_t>::max() is a special signal which is
+    // std::numeric_limits<uint32_t>::max() is a special signal which is
     // returned after the browser stops the output device in response to a
     // renderer side request.
     //
@@ -80,11 +80,8 @@
     // the buffer index for synchronized buffers though.
     //
     // See comments in AudioOutputController::DoPause() for details on why.
-    if (packet.pending_data != std::numeric_limits<int64_t>::max()) {
-      callback_->Process(packet.pending_data,
-                         base::TimeTicks() + base::TimeDelta::FromMicroseconds(
-                                                 packet.data_timestamp_us));
-    }
+    if (pending_data != std::numeric_limits<uint32_t>::max())
+      callback_->Process(pending_data);
 
     // The usage of synchronized buffers differs between input and output cases.
     //