Removing the use of the soon-to-be-removed echo_cancellation_impl

webrtc/modules/audio_processing/audio_processing_impl.cc

Index: webrtc/modules/audio_processing/audio_processing_impl.cc
diff --git a/webrtc/modules/audio_processing/audio_processing_impl.cc b/webrtc/modules/audio_processing/audio_processing_impl.cc
index b3f38f408ea219f3233809ce232901ac3fa1e4b9..a23cb06a4b4e6716b09a144e134f56fae99ed9d6 100644
--- a/webrtc/modules/audio_processing/audio_processing_impl.cc
+++ b/webrtc/modules/audio_processing/audio_processing_impl.cc
@@ -1380,10 +1380,11 @@ void AudioProcessingImpl::MaybeUpdateHistograms() {
     capture_.last_stream_delay_ms = capture_nonlocked_.stream_delay_ms;
 
     // Detect a jump in AEC system delay and log the difference.
-    const int frames_per_ms =
+    const int samples_per_ms =
         rtc::CheckedDivExact(capture_nonlocked_.split_rate, 1000);
     const int aec_system_delay_ms =
-        WebRtcAec_system_delay(echo_cancellation()->aec_core()) / frames_per_ms;
+        public_submodules_->echo_cancellation->GetSystemDelayInSamples() /

[the sun, 2016/02/17 11:39:03]

any risk of a div by zero here?

[peah-webrtc, 2016/03/04 09:46:25]

Should be no risk, but adding a DCHECK just in case.

+        samples_per_ms;
     const int diff_aec_system_delay_ms =
         aec_system_delay_ms - capture_.last_aec_system_delay_ms;
     if (diff_aec_system_delay_ms > kMinDiffDelayMs &&