Fix Chromium clang plugin warnings

webrtc/modules/audio_processing/beamformer/nonlinear_beamformer.cc

Index: webrtc/modules/audio_processing/beamformer/nonlinear_beamformer.cc
diff --git a/webrtc/modules/audio_processing/beamformer/nonlinear_beamformer.cc b/webrtc/modules/audio_processing/beamformer/nonlinear_beamformer.cc
index bfb65c0f7704867b9d5e291866a73b14579bc2ed..5d9d32a80d1e293ae951d97e5a647c5ff87d004e 100644
--- a/webrtc/modules/audio_processing/beamformer/nonlinear_beamformer.cc
+++ b/webrtc/modules/audio_processing/beamformer/nonlinear_beamformer.cc
@@ -222,6 +222,8 @@ NonlinearBeamformer::NonlinearBeamformer(
   WindowGenerator::KaiserBesselDerived(kKbdAlpha, kFftSize, window_);
 }
 
+NonlinearBeamformer::~NonlinearBeamformer() = default;
+
 void NonlinearBeamformer::Initialize(int chunk_size_ms, int sample_rate_hz) {
   chunk_length_ =
       static_cast<size_t>(sample_rate_hz / (1000.f / chunk_size_ms));
@@ -438,6 +440,8 @@ bool NonlinearBeamformer::IsInBeam(const SphericalPointf& spherical_point) {
          kHalfBeamWidthRadians;
 }
 
+bool NonlinearBeamformer::is_target_present() { return is_target_present_; }
+
 void NonlinearBeamformer::ProcessAudioBlock(const complex_f* const* input,
                                             size_t num_input_channels,
                                             size_t num_freq_bins,