Remove usage of FOR_EACH_OBSERVER macro in remoting

remoting/protocol/webrtc_audio_source_adapter.cc

 // Copyright 2016 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 "remoting/protocol/webrtc_audio_source_adapter.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/thread_checker.h"
@@ skipping 107 matching lines @@
     partial_frame_.insert(partial_frame_.end(), data.data(),
                              data.data() + bytes_to_append);
     if (partial_frame_.size() < bytes_per_frame) {
       // Still don't have full frame.
       return;
     }
 
     // Here |partial_frame_| always contains a full frame.
     DCHECK_EQ(partial_frame_.size(), bytes_per_frame);
 
-    FOR_EACH_OBSERVER(webrtc::AudioTrackSinkInterface, audio_sinks_,
-                      OnData(&partial_frame_.front(), kBytesPerSample * 8,
-                             sampling_rate_, kChannels, samples_per_frame));
+    for (auto& observer : audio_sinks_) {
+      observer.OnData(&partial_frame_.front(), kBytesPerSample * 8,
+                      sampling_rate_, kChannels, samples_per_frame);
+    }
   }
 
   while (position + bytes_per_frame <= data.size()) {
-    FOR_EACH_OBSERVER(webrtc::AudioTrackSinkInterface, audio_sinks_,
-                      OnData(data.data() + position, kBytesPerSample * 8,
-                             sampling_rate_, kChannels, samples_per_frame));
+    for (auto& observer : audio_sinks_) {
+      observer.OnData(data.data() + position, kBytesPerSample * 8,
+                      sampling_rate_, kChannels, samples_per_frame);
+    }
     position += bytes_per_frame;
   }
 
   partial_frame_.assign(data.data() + position, data.data() + data.size());
 }
 
 WebrtcAudioSourceAdapter::WebrtcAudioSourceAdapter(
     scoped_refptr<base::SingleThreadTaskRunner> audio_task_runner)
     : audio_task_runner_(audio_task_runner), core_(new Core()) {}
 
@@ skipping 35 matching lines @@
   core_->RemoveSink(sink);
 }
 
 void WebrtcAudioSourceAdapter::RegisterObserver(
     webrtc::ObserverInterface* observer) {}
 void WebrtcAudioSourceAdapter::UnregisterObserver(
     webrtc::ObserverInterface* observer) {}
 
 }  // namespace protocol
 }  // namespace remoting