Revert of Delete unused and almost unused frame-related methods.

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 328c0ca5867e3cb70659d8a8aa7a0af718664c7e..dfffb9a0d6cae74c0eb9a844d7789f0fbd96ffcc 100644
--- a/webrtc/common_video/include/video_frame_buffer.h
+++ b/webrtc/common_video/include/video_frame_buffer.h
@@ -48,20 +48,27 @@
 
   // Returns pointer to the pixel data for a given plane. The memory is owned by
   // the VideoFrameBuffer object and must not be freed by the caller.
-  virtual const uint8_t* DataY() const = 0;
-  virtual const uint8_t* DataU() const = 0;
-  virtual const uint8_t* DataV() const = 0;
+  virtual const uint8_t* DataY() const;
+  virtual const uint8_t* DataU() const;
+  virtual const uint8_t* DataV() const;
+  // Deprecated method.
+  // TODO(nisse): Delete after all users are updated.
+  virtual const uint8_t* data(PlaneType type) const;
 
   // TODO(nisse): Move MutableData methods to the I420Buffer subclass.
   // Non-const data access.
   virtual uint8_t* MutableDataY();
   virtual uint8_t* MutableDataU();
   virtual uint8_t* MutableDataV();
+  // Deprecated method. TODO(nisse): Delete after all users are updated.
+  virtual uint8_t* MutableData(PlaneType type);
 
   // Returns the number of bytes between successive rows for a given plane.
-  virtual int StrideY() const = 0;
-  virtual int StrideU() const = 0;
-  virtual int StrideV() const = 0;
+  virtual int StrideY() const;
+  virtual int StrideU() const;
+  virtual int StrideV() const;
+  // Deprecated method. TODO(nisse): Delete after all users are updated.
+  virtual int stride(PlaneType type) const;
 
   // Return the handle of the underlying video frame. This is used when the
   // frame is backed by a texture.