Move VideoFrame and related declarations to webrtc/api/video.

webrtc/media/base/adaptedvideotracksource.cc

Index: webrtc/media/base/adaptedvideotracksource.cc
diff --git a/webrtc/media/base/adaptedvideotracksource.cc b/webrtc/media/base/adaptedvideotracksource.cc
index acc147cc8903c6da2a7578fbcb8bb23a5c074659..560b90354514a19de83edbd5b1a55aac17d3373c 100644
--- a/webrtc/media/base/adaptedvideotracksource.cc
+++ b/webrtc/media/base/adaptedvideotracksource.cc
@@ -10,6 +10,8 @@
 
 #include "webrtc/media/base/adaptedvideotracksource.h"
 
+#include "webrtc/api/video/i420_buffer.h"
+
 namespace rtc {
 
 AdaptedVideoTrackSource::AdaptedVideoTrackSource() {
@@ -43,7 +45,7 @@ void AdaptedVideoTrackSource::OnFrame(const webrtc::VideoFrame& frame) {
       !buffer->native_handle()) {
     /* Apply pending rotation. */
     broadcaster_.OnFrame(webrtc::VideoFrame(
-        webrtc::I420Buffer::Rotate(buffer, frame.rotation()),
+        webrtc::I420Buffer::Rotate(*buffer, frame.rotation()),
         webrtc::kVideoRotation_0, frame.timestamp_us()));
   } else {
     broadcaster_.OnFrame(frame);