Revert of Remove typedefs.h from webrtc/ root (part 1)

webrtc/video/video_stream_encoder.cc

Index: webrtc/video/video_stream_encoder.cc
diff --git a/webrtc/video/video_stream_encoder.cc b/webrtc/video/video_stream_encoder.cc
index 7d810dc194c911fbd8d6f6dd2efaaab33d179b31..52dcbf0832ca9a45c16f00be33b00f71f8bc99b7 100644
--- a/webrtc/video/video_stream_encoder.cc
+++ b/webrtc/video/video_stream_encoder.cc
@@ -978,7 +978,7 @@
         break;
       }
       // Scale down resolution.
-      RTC_FALLTHROUGH();
+      FALLTHROUGH();
     }
     case VideoSendStream::DegradationPreference::kMaintainFramerate:
       // Scale down resolution.
@@ -1056,7 +1056,7 @@
         break;
       }
       // Scale up resolution.
-      RTC_FALLTHROUGH();
+      FALLTHROUGH();
     }
     case VideoSendStream::DegradationPreference::kMaintainFramerate: {
       // Scale up resolution.