Delete browser MSE implementation.

content/browser/media/android/media_player_renderer.cc

 // Copyright 2016 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 "content/browser/media/android/media_player_renderer.h"
 
 #include <memory>
 
 #include "content/browser/media/android/media_resource_getter_impl.h"
 #include "content/public/browser/browser_context.h"
@@ skipping 176 matching lines @@
   renderer_client_->OnError(media::PIPELINE_ERROR_EXTERNAL_RENDERER_FAILED);
 }
 
 void MediaPlayerRenderer::OnVideoSizeChanged(int player_id,
                                              int width,
                                              int height) {
   video_size_ = gfx::Size(width, height);
   renderer_client_->OnVideoNaturalSizeChange(video_size_);
 }
 
-void MediaPlayerRenderer::OnWaitingForDecryptionKey(int player_id) {
-  NOTREACHED();
-}
-
 media::MediaPlayerAndroid* MediaPlayerRenderer::GetFullscreenPlayer() {
   NOTREACHED();
   return nullptr;
 }
 
 media::MediaPlayerAndroid* MediaPlayerRenderer::GetPlayer(int player_id) {
   NOTREACHED();
   return nullptr;
 }
 
 bool MediaPlayerRenderer::RequestPlay(int player_id,
                                       base::TimeDelta duration,
                                       bool has_audio) {
   // TODO(tguilbert): Throttle requests, via exponential backoff.
   // See crbug.com/636615.
   return true;
 }
 
 void MediaPlayerRenderer::OnDecoderResourcesReleased(int player_id) {
   // Since we are not using a pool of MediaPlayerAndroid instances, this
   // function is not relevant.
 
   // TODO(tguilbert): Throttle requests, via exponential backoff.
   // See crbug.com/636615.
 }
 
 }  // namespace content