Delete method webrtc::VideoFrame::allocated_size and enum PlaneType.

BUG=webrtc:5682

Review-Url: https://codereview.webrtc.org/2380623002
Cr-Original-Commit-Position: refs/heads/master@{#14416}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: e5684c5387bbc2cbbca80eefc3e3f6474c180647
diff --git a/modules/video_coding/codecs/h264/h264_decoder_impl.cc b/modules/video_coding/codecs/h264/h264_decoder_impl.cc
index 3cc08d2..d67a434 100644
--- a/modules/video_coding/codecs/h264/h264_decoder_impl.cc
+++ b/modules/video_coding/codecs/h264/h264_decoder_impl.cc
@@ -347,11 +347,11 @@
   VideoFrame* video_frame = static_cast<VideoFrame*>(
       av_buffer_get_opaque(av_frame_->buf[0]));
   RTC_DCHECK(video_frame);
-  RTC_CHECK_EQ(av_frame_->data[kYPlane],
+  RTC_CHECK_EQ(av_frame_->data[kYPlaneIndex],
                video_frame->video_frame_buffer()->DataY());
-  RTC_CHECK_EQ(av_frame_->data[kUPlane],
+  RTC_CHECK_EQ(av_frame_->data[kUPlaneIndex],
                video_frame->video_frame_buffer()->DataU());
-  RTC_CHECK_EQ(av_frame_->data[kVPlane],
+  RTC_CHECK_EQ(av_frame_->data[kVPlaneIndex],
                video_frame->video_frame_buffer()->DataV());
   video_frame->set_timestamp(input_image._timeStamp);
 
diff --git a/modules/video_coding/codecs/vp8/simulcast_unittest.h b/modules/video_coding/codecs/vp8/simulcast_unittest.h
index 22e8645..4aefb38 100644
--- a/modules/video_coding/codecs/vp8/simulcast_unittest.h
+++ b/modules/video_coding/codecs/vp8/simulcast_unittest.h
@@ -49,6 +49,13 @@
   expected_values[2] = value2;
 }
 
+enum PlaneType {
+  kYPlane = 0,
+  kUPlane = 1,
+  kVPlane = 2,
+  kNumOfPlanes = 3,
+};
+
 class Vp8TestEncodedImageCallback : public EncodedImageCallback {
  public:
   Vp8TestEncodedImageCallback() : picture_id_(-1) {