Add AudioStreamRegistry. Move stream counting logic

content/browser/renderer_host/render_process_host_impl.h

Index: content/browser/renderer_host/render_process_host_impl.h
diff --git a/content/browser/renderer_host/render_process_host_impl.h b/content/browser/renderer_host/render_process_host_impl.h
index dfe8d2481c796de7ee6adfb3e236a0f6af0c3671..c661f6b492af16e311391c6e00db63dabb813deb 100644
--- a/content/browser/renderer_host/render_process_host_impl.h
+++ b/content/browser/renderer_host/render_process_host_impl.h
@@ -22,6 +22,7 @@
 #include "build/build_config.h"
 #include "content/browser/child_process_launcher.h"
 #include "content/browser/dom_storage/session_storage_namespace_impl.h"
+#include "content/browser/renderer_host/media/audio_stream_registry_impl.h"
 #include "content/browser/webrtc/webrtc_eventlog_host.h"
 #include "content/common/associated_interfaces.mojom.h"
 #include "content/common/content_export.h"
@@ -529,6 +530,8 @@ class CONTENT_EXPORT RenderProcessHostImpl
   // through RenderProcessHostObserver::RenderProcessExited.
   bool within_process_died_observer_;
 
+  AudioStreamRegistryImpl::UniquePtr audio_stream_registry_;

[o1ka, 2016/12/22 10:46:52]

Where will it live in audio process?

+
   scoped_refptr<AudioRendererHost> audio_renderer_host_;
 
   scoped_refptr<AudioInputRendererHost> audio_input_renderer_host_;