Delete webrtc::VideoFrame methods buffer and stride.

webrtc/modules/video_render/ios/open_gles20.mm

Index: webrtc/modules/video_render/ios/open_gles20.mm
diff --git a/webrtc/modules/video_render/ios/open_gles20.mm b/webrtc/modules/video_render/ios/open_gles20.mm
index d1735280f26e2a1ab4a8aa7641c3debdef127654..01737ee2bbd6d78208220c4da5b2713cdc056028 100644
--- a/webrtc/modules/video_render/ios/open_gles20.mm
+++ b/webrtc/modules/video_render/ios/open_gles20.mm
@@ -316,15 +316,19 @@ void OpenGles20::UpdateTextures(const VideoFrame& frame) {
 
   glActiveTexture(GL_TEXTURE0);
   glBindTexture(GL_TEXTURE_2D, texture_ids_[0]);
-  GlTexSubImage2D(width, height, frame.stride(kYPlane), frame.buffer(kYPlane));
+  GlTexSubImage2D(width, height,
+                  frame.video_frame_buffer()->StrideY(),
+                  frame.video_frame_buffer()->DataY());
 
   glActiveTexture(GL_TEXTURE1);
   glBindTexture(GL_TEXTURE_2D, texture_ids_[1]);
-  GlTexSubImage2D(
-      width / 2, height / 2, frame.stride(kUPlane), frame.buffer(kUPlane));
+  GlTexSubImage2D(width / 2, height / 2,
+                  frame.video_frame_buffer()->StrideU(),
+                  frame.video_frame_buffer()->DataU());
 
   glActiveTexture(GL_TEXTURE2);
   glBindTexture(GL_TEXTURE_2D, texture_ids_[2]);
-  GlTexSubImage2D(
-      width / 2, height / 2, frame.stride(kVPlane), frame.buffer(kVPlane));
+  GlTexSubImage2D(width / 2, height / 2,
+                  frame.video_frame_buffer()->StrideV(),
+                  frame.video_frame_buffer()->DataV());
 }