[Chromecast] Set all video to opaque

chromecast/browser/media/cast_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 "chromecast/browser/media/cast_renderer.h"
 
 #include "base/bind.h"
 #include "base/single_thread_task_runner.h"
 #include "chromecast/base/task_runner_impl.h"
 #include "chromecast/media/cdm/cast_cdm_context.h"
@@ skipping 125 matching lines @@
     video_stream->EnableBitstreamConverter();
   }
 
   if (cast_cdm_context_) {
     pipeline_->SetCdm(cast_cdm_context_);
     cast_cdm_context_ = nullptr;
   }
 
   client_ = client;
   init_cb.Run(::media::PIPELINE_OK);
+
+  if (video_stream) {
+    // Force compositor to treat video as opaque (needed for overlay codepath).
+    OnVideoOpacityChange(true);
+  }
 }
 
 void CastRenderer::SetCdm(::media::CdmContext* cdm_context,
                           const ::media::CdmAttachedCB& cdm_attached_cb) {
   DCHECK(task_runner_->BelongsToCurrentThread());
   DCHECK(cdm_context);
 
   auto cast_cdm_context = static_cast<CastCdmContext*>(cdm_context);
 
   if (!pipeline_) {
@@ skipping 76 matching lines @@
   client_->OnWaitingForDecryptionKey();
 }
 
 void CastRenderer::OnVideoNaturalSizeChange(const gfx::Size& size) {
   DCHECK(task_runner_->BelongsToCurrentThread());
   client_->OnVideoNaturalSizeChange(size);
 }
 
 void CastRenderer::OnVideoOpacityChange(bool opaque) {
   DCHECK(task_runner_->BelongsToCurrentThread());
+  DCHECK(opaque);
   client_->OnVideoOpacityChange(opaque);
 }
 
 }  // namespace media
 }  // namespace chromecast