Revert of Add method cricket::VideoCapturer::NeedsDenoising, use in VideoCapturerTrackSource.

webrtc/media/base/videocapturer.h

Index: webrtc/media/base/videocapturer.h
diff --git a/webrtc/media/base/videocapturer.h b/webrtc/media/base/videocapturer.h
index bf3bc64838003cb00182a5c10a5fa27489c81339..909c838fa55c3d9fd93ad171dfc6d5b435a74a02 100644
--- a/webrtc/media/base/videocapturer.h
+++ b/webrtc/media/base/videocapturer.h
@@ -140,18 +140,6 @@ class VideoCapturer : public sigslot::has_slots<>,
   // implement screencast specific behavior.
   virtual bool IsScreencast() const = 0;
 
-  // Indicates that the encoder should denoise video before encoding
-  // it, wired up to VideoCapturerTrackSource::needs_denoising. If it
-  // is not set, the default configuration is used which is different
-  // depending on video codec.
-  // TODO(nisse): This is a workaround needed to fix
-  // https://bugs.chromium.org/p/chromium/issues/detail?id=645907.
-  // Chrome should migrate to implement VideoTrackSourceInterface
-  // directly, and then this method is no longer needed.
-  virtual rtc::Optional<bool> NeedsDenoising() const {
-    return rtc::Optional<bool>();
-  }
-
   // Caps the VideoCapturer's format according to max_format. It can e.g. be
   // used to prevent cameras from capturing at a resolution or framerate that
   // the capturer is capable of but not performing satisfactorily at.