Make the nonlinear beamformer steerable

webrtc/modules/audio_processing/beamformer/beamformer.h

Index: webrtc/modules/audio_processing/beamformer/beamformer.h
diff --git a/webrtc/modules/audio_processing/beamformer/beamformer.h b/webrtc/modules/audio_processing/beamformer/beamformer.h
index 54734dddb89a62e2525bd97a00544417be90656f..6a9ff45d129e14d84676db9b068b414f26850c54 100644
--- a/webrtc/modules/audio_processing/beamformer/beamformer.h
+++ b/webrtc/modules/audio_processing/beamformer/beamformer.h
@@ -32,6 +32,9 @@ class Beamformer {
   // Needs to be called before the the Beamformer can be used.
   virtual void Initialize(int chunk_size_ms, int sample_rate_hz) = 0;
 
+  // Aim the beamformer at a point in space.
+  virtual void AimAt(const SphericalPointf& spherical_point) = 0;
+
   // Indicates whether a given point is inside of the beam.
   virtual bool IsInBeam(const SphericalPointf& spherical_point) { return true; }