[Cast] Size-Adaptable platform video encoders.

media/cast/sender/video_encoder_impl.cc

Index: media/cast/sender/video_encoder_impl.cc
diff --git a/media/cast/sender/video_encoder_impl.cc b/media/cast/sender/video_encoder_impl.cc
index a2b0da9075253213ac1396224fd15b4b9f41f9eb..84f700e2cf9eb3edf7b47cf9822120504c81747f 100644
--- a/media/cast/sender/video_encoder_impl.cc
+++ b/media/cast/sender/video_encoder_impl.cc
@@ -52,6 +52,15 @@ void EncodeVideoFrameOnEncoderThread(
 }
 }  // namespace
 
+// static
+bool VideoEncoderImpl::IsSupported(const VideoSenderConfig& video_config) {
+#ifndef OFFICIAL_BUILD
+  if (video_config.codec == CODEC_VIDEO_FAKE)
+    return true;
+#endif
+  return video_config.codec == CODEC_VIDEO_VP8;
+}
+
 VideoEncoderImpl::VideoEncoderImpl(
     scoped_refptr<CastEnvironment> cast_environment,
     const VideoSenderConfig& video_config,
@@ -98,12 +107,6 @@ VideoEncoderImpl::~VideoEncoderImpl() {
   }
 }
 
-bool VideoEncoderImpl::CanEncodeVariedFrameSizes() const {
-  // Both the VP8Encoder and FakeSoftwareVideoEncoder support calls to
-  // EncodeVideoFrame() with different frame sizes.
-  return true;
-}
-
 bool VideoEncoderImpl::EncodeVideoFrame(
     const scoped_refptr<media::VideoFrame>& video_frame,
     const base::TimeTicks& reference_time,