Add AudioStreamRegistry. Move stream counting logic

content/public/test/mock_render_process_host.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_PUBLIC_TEST_MOCK_RENDER_PROCESS_HOST_H_
 #define CONTENT_PUBLIC_TEST_MOCK_RENDER_PROCESS_HOST_H_
 
 #include <stddef.h>
 #include <stdint.h>
 #include <memory>
@@ skipping 127 matching lines @@
   }
 
   void GetAudioOutputControllers(
       const GetAudioOutputControllersCallback& callback) const override {}
 
   void SetRemoteInterfaces(
       std::unique_ptr<service_manager::InterfaceProvider> remote_interfaces) {
     remote_interfaces_ = std::move(remote_interfaces);
   }
 
+  void SetAudioStateChangedCallback(base::Closure closure) {
+    audio_state_changed_callback_ = closure;
+  }
+
  private:
   // Stores IPC messages that would have been sent to the renderer.
   IPC::TestSink sink_;
   int bad_msg_count_;
   const MockRenderProcessHostFactory* factory_;
   int id_;
   bool has_connection_;
   BrowserContext* browser_context_;
   base::ObserverList<RenderProcessHostObserver> observers_;
 
   IDMap<RenderWidgetHost*> render_widget_hosts_;
   int prev_routing_id_;
   IDMap<IPC::Listener*> listeners_;
   bool fast_shutdown_started_;
   bool deletion_callback_called_;
   bool is_for_guests_only_;
   bool is_process_backgrounded_;
   std::unique_ptr<base::ProcessHandle> process_handle;
   int worker_ref_count_;
   std::unique_ptr<service_manager::InterfaceProvider> remote_interfaces_;
   std::unique_ptr<mojo::AssociatedInterfacePtr<mojom::Renderer>>
       renderer_interface_;
+  base::Closure audio_state_changed_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(MockRenderProcessHost);
 };
 
 class MockRenderProcessHostFactory : public RenderProcessHostFactory {
  public:
   MockRenderProcessHostFactory();
   ~MockRenderProcessHostFactory() override;
 
   RenderProcessHost* CreateRenderProcessHost(
@@ skipping 10 matching lines @@
   // for deleting all MockRenderProcessHosts that have not deleted by a test in
   // the destructor and prevent them from being leaked.
   mutable ScopedVector<MockRenderProcessHost> processes_;
 
   DISALLOW_COPY_AND_ASSIGN(MockRenderProcessHostFactory);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_TEST_MOCK_RENDER_PROCESS_HOST_H_