Switch stream creation and closing in Chrome audio rendering from IPC to Mojo

content/public/test/mock_render_process_host.h

Index: content/public/test/mock_render_process_host.h
diff --git a/content/public/test/mock_render_process_host.h b/content/public/test/mock_render_process_host.h
index a7aca5f9f77452c19a0be6efa3e374595733d003..32047565a593e83f5b086967300ebe3575581705 100644
--- a/content/public/test/mock_render_process_host.h
+++ b/content/public/test/mock_render_process_host.h
@@ -13,6 +13,7 @@
 #include "base/memory/scoped_vector.h"
 #include "base/metrics/persistent_memory_allocator.h"
 #include "base/observer_list.h"
+
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_process_host_factory.h"
 #include "content/public/common/service_registry.h"
@@ -21,6 +22,7 @@
 class StoragePartition;
 
 namespace content {
+class AudioRendererHost;
 
 class MockRenderProcessHostFactory;
 
@@ -114,6 +116,8 @@ class MockRenderProcessHost : public RenderProcessHost {
   bool OnMessageReceived(const IPC::Message& msg) override;
   void OnChannelConnected(int32_t peer_pid) override;
 
+  scoped_refptr<AudioRendererHost> audio_renderer_host() const override;
+
   // Attaches the factory object so we can remove this object in its destructor
   // and prevent MockRenderProcessHostFacotry from deleting it.
   void SetFactory(const MockRenderProcessHostFactory* factory) {