Fix Chromium clang plugin warnings

webrtc/modules/audio_processing/test/audio_processing_simulator.h

Index: webrtc/modules/audio_processing/test/audio_processing_simulator.h
diff --git a/webrtc/modules/audio_processing/test/audio_processing_simulator.h b/webrtc/modules/audio_processing/test/audio_processing_simulator.h
index 367e30f1f7f0067d224db7b845ac4ef8b1de1f74..d1def43b352248432f0bd89cf6e8c5993069c8a8 100644
--- a/webrtc/modules/audio_processing/test/audio_processing_simulator.h
+++ b/webrtc/modules/audio_processing/test/audio_processing_simulator.h
@@ -28,6 +28,9 @@ namespace test {
 
 // Holds all the parameters available for controlling the simulation.
 struct SimulationSettings {
+  SimulationSettings();
+  SimulationSettings(const SimulationSettings&);
+  ~SimulationSettings();
   rtc::Optional<int> stream_delay;
   rtc::Optional<int> stream_drift_samples;
   rtc::Optional<int> output_sample_rate_hz;
@@ -92,9 +95,8 @@ class AudioProcessingSimulator {
  public:
   static const int kChunksPerSecond = 1000 / AudioProcessing::kChunkSizeMs;
 
-  explicit AudioProcessingSimulator(const SimulationSettings& settings)
-      : settings_(settings) {}
-  virtual ~AudioProcessingSimulator() {}
+  explicit AudioProcessingSimulator(const SimulationSettings& settings);
+  virtual ~AudioProcessingSimulator();
 
   // Processes the data in the input.
   virtual void Process() = 0;