Update I420Buffer to new VideoFrameBuffer interface

webrtc/modules/video_coding/codecs/vp8/test/vp8_impl_unittest.cc

Index: webrtc/modules/video_coding/codecs/vp8/test/vp8_impl_unittest.cc
diff --git a/webrtc/modules/video_coding/codecs/vp8/test/vp8_impl_unittest.cc b/webrtc/modules/video_coding/codecs/vp8/test/vp8_impl_unittest.cc
index d566ea82b05145e14789603c8424d911320ac39a..22f52d4df815fb9c468d0be5409b3d9d2c404340 100644
--- a/webrtc/modules/video_coding/codecs/vp8/test/vp8_impl_unittest.cc
+++ b/webrtc/modules/video_coding/codecs/vp8/test/vp8_impl_unittest.cc
@@ -157,7 +157,7 @@ class TestVp8Impl : public ::testing::Test {
     // Processing only one frame.
     source_file_ = fopen(test::ResourcePath("paris_qcif", "yuv").c_str(), "rb");
     ASSERT_TRUE(source_file_ != nullptr);
-    rtc::scoped_refptr<VideoFrameBuffer> compact_buffer(
+    rtc::scoped_refptr<I420BufferInterface> compact_buffer(
         test::ReadI420Buffer(kWidth, kHeight, source_file_));
     ASSERT_TRUE(compact_buffer);
     codec_settings_.width = kWidth;