Chromecast: communicate HDMI-sink codec changes over IPC.

chromecast/renderer/cast_render_process_observer.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 "chromecast/renderer/cast_render_process_observer.h"
 
+#include "chromecast/renderer/media/capabilities_message_filter.h"
 #include "chromecast/renderer/media/cma_message_filter_proxy.h"
 #include "content/public/renderer/render_thread.h"
 
 namespace chromecast {
 namespace shell {
 
 CastRenderProcessObserver::CastRenderProcessObserver(
     const std::vector<scoped_refptr<IPC::MessageFilter>>&
         platform_message_filters)
     : platform_message_filters_(platform_message_filters) {
   content::RenderThread* thread = content::RenderThread::Get();
   thread->AddObserver(this);
   CreateCustomFilters();
 }
 
 CastRenderProcessObserver::~CastRenderProcessObserver() {
   // CastRenderProcessObserver outlives content::RenderThread.
   // No need to explicitly call RemoveObserver in teardown.
 }
 
 void CastRenderProcessObserver::CreateCustomFilters() {
   content::RenderThread* thread = content::RenderThread::Get();
 #if !defined(OS_ANDROID)
   cma_message_filter_proxy_ =
       new media::CmaMessageFilterProxy(thread->GetIOMessageLoopProxy());
   thread->AddFilter(cma_message_filter_proxy_.get());
 #endif  // !defined(OS_ANDROID)
+  capabilities_message_filter_ = new CapabilitiesMessageFilter;
+  thread->AddFilter(capabilities_message_filter_.get());
   for (const auto& filter : platform_message_filters_) {
     thread->AddFilter(filter.get());
   }
 }
 
 void CastRenderProcessObserver::OnRenderProcessShutdown() {
   content::RenderThread* thread = content::RenderThread::Get();
 #if !defined(OS_ANDROID)
   if (cma_message_filter_proxy_.get()) {
     thread->RemoveFilter(cma_message_filter_proxy_.get());
-    cma_message_filter_proxy_ = NULL;
+    cma_message_filter_proxy_ = nullptr;
   }
 #endif  // !defined(OS_ANDROID)
+  if (capabilities_message_filter_.get()) {
+    thread->RemoveFilter(capabilities_message_filter_.get());
+    capabilities_message_filter_ = nullptr;
+  }
   for (auto& filter : platform_message_filters_) {
     if (filter.get()) {
       thread->RemoveFilter(filter.get());
       filter = nullptr;
     }
   }
   platform_message_filters_.clear();
 }
 
 }  // namespace shell
 }  // namespace chromecast