Don't use libvpx if it is disabled in GN build

media/cast/sender/video_encoder_impl.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/cast/sender/video_encoder_impl.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "media/base/video_frame.h"
 #include "media/cast/cast_defines.h"
 #include "media/cast/sender/fake_software_video_encoder.h"
+#if !defined(MEDIA_DISABLE_LIBVPX)
 #include "media/cast/sender/vp8_encoder.h"
+#endif  // !defined(MEDIA_DISABLE_LIBVPX)
 
 namespace media {
 namespace cast {
 
 namespace {
 
+#if !defined(MEDIA_DISABLE_LIBVPX)
 typedef base::Callback<void(Vp8Encoder*)> PassEncoderCallback;
 
 void InitializeEncoderOnEncoderThread(
     const scoped_refptr<CastEnvironment>& environment,
     SoftwareVideoEncoder* encoder) {
   DCHECK(environment->CurrentlyOn(CastEnvironment::VIDEO));
   encoder->Initialize();
 }
+#endif  // !defined(MEDIA_DISABLE_LIBVPX)
 
 void EncodeVideoFrameOnEncoderThread(
     scoped_refptr<CastEnvironment> environment,
     SoftwareVideoEncoder* encoder,
     const scoped_refptr<media::VideoFrame>& video_frame,
     const base::TimeTicks& capture_time,
     const VideoEncoderImpl::CodecDynamicConfig& dynamic_config,
     const VideoEncoderImpl::FrameEncodedCallback& frame_encoded_callback) {
   DCHECK(environment->CurrentlyOn(CastEnvironment::VIDEO));
   if (dynamic_config.key_frame_requested) {
@@ skipping 23 matching lines @@
           frame_encoded_callback, base::Passed(&encoded_frame)));
 }
 }  // namespace
 
 VideoEncoderImpl::VideoEncoderImpl(
     scoped_refptr<CastEnvironment> cast_environment,
     const VideoSenderConfig& video_config,
     int max_unacked_frames)
     : cast_environment_(cast_environment) {
   if (video_config.codec == CODEC_VIDEO_VP8) {
+#if !defined(MEDIA_DISABLE_LIBVPX)
     encoder_.reset(new Vp8Encoder(video_config, max_unacked_frames));
     cast_environment_->PostTask(CastEnvironment::VIDEO,
                                 FROM_HERE,
                                 base::Bind(&InitializeEncoderOnEncoderThread,
                                            cast_environment,
                                            encoder_.get()));
+#endif  // !defined(MEDIA_DISABLE_LIBVPX)
 #ifndef OFFICIAL_BUILD
   } else if (video_config.codec == CODEC_VIDEO_FAKE) {
     encoder_.reset(new FakeSoftwareVideoEncoder(video_config));
 #endif
   } else {
     DCHECK(false) << "Invalid config";  // Codec not supported.
   }
 
   dynamic_config_.key_frame_requested = false;
   dynamic_config_.latest_frame_id_to_reference = kStartFrameId;
@@ skipping 40 matching lines @@
   dynamic_config_.key_frame_requested = true;
 }
 
 // Inform the encoder to only reference frames older or equal to frame_id;
 void VideoEncoderImpl::LatestFrameIdToReference(uint32 frame_id) {
   dynamic_config_.latest_frame_id_to_reference = frame_id;
 }
 
 }  //  namespace cast
 }  //  namespace media