Applied the render queueing to the agc.

BUG=webrtc:5099

Review URL: https://codereview.webrtc.org/1416583003

Cr-Commit-Position: refs/heads/master@{#10667}
diff --git a/webrtc/modules/audio_processing/audio_processing_impl.cc b/webrtc/modules/audio_processing/audio_processing_impl.cc
index 0daaf1f..3105224 100644
--- a/webrtc/modules/audio_processing/audio_processing_impl.cc
+++ b/webrtc/modules/audio_processing/audio_processing_impl.cc
@@ -532,6 +532,7 @@
 
   echo_cancellation_->ReadQueuedRenderData();
   echo_control_mobile_->ReadQueuedRenderData();
+  gain_control_->ReadQueuedRenderData();
 
   ProcessingConfig processing_config = api_format_;
   processing_config.input_stream() = input_config;
@@ -576,6 +577,7 @@
   CriticalSectionScoped crit_scoped(crit_);
   echo_cancellation_->ReadQueuedRenderData();
   echo_control_mobile_->ReadQueuedRenderData();
+  gain_control_->ReadQueuedRenderData();
 
   if (!frame) {
     return kNullPointerError;