Revert of Add support for multiple pixel formats in VideoFrameBuffer

webrtc/common_video/include/video_frame_buffer.h

Index: webrtc/common_video/include/video_frame_buffer.h
diff --git a/webrtc/common_video/include/video_frame_buffer.h b/webrtc/common_video/include/video_frame_buffer.h
index 7e2fcf99e1f8ddbee9bd5a0e757816719311f05d..e6c1f147a262e4570dd808f54b1eafb2d9a8e279 100644
--- a/webrtc/common_video/include/video_frame_buffer.h
+++ b/webrtc/common_video/include/video_frame_buffer.h
@@ -27,7 +27,6 @@
  public:
   NativeHandleBuffer(void* native_handle, int width, int height);
 
-  Type type() const override;
   int width() const override;
   int height() const override;
   const uint8_t* DataY() const override;
@@ -45,7 +44,7 @@
   const int height_;
 };
 
-class WrappedI420Buffer : public PlanarYuvBuffer {
+class WrappedI420Buffer : public webrtc::VideoFrameBuffer {
  public:
   WrappedI420Buffer(int width,
                     int height,
@@ -56,8 +55,6 @@
                     const uint8_t* v_plane,
                     int v_stride,
                     const rtc::Callback0<void>& no_longer_used);
-  Type type() const override;
-
   int width() const override;
   int height() const override;
 
@@ -67,6 +64,10 @@
   int StrideY() const override;
   int StrideU() const override;
   int StrideV() const override;
+
+  void* native_handle() const override;
+
+  rtc::scoped_refptr<VideoFrameBuffer> NativeToI420Buffer() override;
 
  private:
   friend class rtc::RefCountedObject<WrappedI420Buffer>;