Fix multiple Initialize() calls and reenable VEA usage in MediaRecorder for Win8

content/renderer/media_recorder/video_track_recorder.cc

Index: content/renderer/media_recorder/video_track_recorder.cc
diff --git a/content/renderer/media_recorder/video_track_recorder.cc b/content/renderer/media_recorder/video_track_recorder.cc
index 3b1b0a5578ee8617ee68c64058455517a096172e..c18c3683c7573cdbe88d66df3cad5ad0737fa65f 100644
--- a/content/renderer/media_recorder/video_track_recorder.cc
+++ b/content/renderer/media_recorder/video_track_recorder.cc
@@ -30,10 +30,6 @@
 #include "third_party/libyuv/include/libyuv.h"
 #include "ui/gfx/geometry/size.h"
 
-#if defined(OS_WIN)
-#include "base/win/windows_version.h"
-#endif
-
 #if BUILDFLAG(RTC_USE_H264)
 #include "third_party/openh264/src/codec/api/svc/codec_api.h"
 #include "third_party/openh264/src/codec/api/svc/codec_app_def.h"
@@ -121,12 +117,6 @@ CodecEnumerator::CodecEnumerator() {
   return;
 #endif
 
-#if defined(OS_WIN)
-  // See https://crbug.com/698441.
-  if (base::win::GetVersion() < base::win::VERSION_WIN10)
-    return;
-#endif
-
   content::RenderThreadImpl* const render_thread_impl =
       content::RenderThreadImpl::current();
   if (!render_thread_impl) {
@@ -1303,6 +1293,11 @@ void VideoTrackRecorder::InitializeEncoder(
   DVLOG(3) << __func__ << frame->visible_rect().size().ToString();
   DCHECK(main_render_thread_checker_.CalledOnValidThread());
 
+  // Avoid reinitializing |encoder_| when there are multiple frames sent to the
+  // sink to initialize, https://crbug.com/698441.
+  if (encoder_)
+    return;
+
   MediaStreamVideoSink::DisconnectFromTrack();
 
   const gfx::Size& input_size = frame->visible_rect().size();