Add back RenderFrameHost sanity-check to AudioRendererHost.

content/browser/renderer_host/media/audio_renderer_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.
 //
 // AudioRendererHost serves audio related requests from AudioRenderer which
 // lives inside the render process and provide access to audio hardware.
 //
 // This class is owned by RenderProcessHostImpl, and instantiated on UI
 // thread, but all other operations and method calls happen on IO thread, so we
 // need to be extra careful about the lifetime of this object. AudioManager is a
@@ skipping 111 matching lines @@
   // |have_access| is true only if there is permission to access the device.
   typedef base::Callback<void(bool have_access)> OutputDeviceAccessCB;
 
   // Internal callback type for information requests about an output device.
   // |success| indicates the operation was successful. If true, |device_info|
   // contains data about the device.
   typedef base::Callback<void(bool success,
                               const AudioOutputDeviceInfo& device_info)>
       OutputDeviceInfoCB;
 
+  // Function that is run on the UI thread to check whether the routing IDs
+  // reference a valid RenderFrameHost. The function then runs |callback| on the
+  // IO thread with true/false if valid/invalid.
+  using ValidateRenderFrameIdFunction =
+      void (*)(int render_process_id,
+               int render_frame_id,
+               const base::Callback<void(bool)>& callback);
+
   ~AudioRendererHost() override;
 
   // Methods called on IO thread ----------------------------------------------
 
   // Audio related IPC message handlers.
 
   // Request permission to use an output device for use by a stream produced
   // in the RenderFrame referenced by |render_frame_id|.
   // |session_id| is used for unified IO to find out which input device to be
   // opened for the stream. For clients that do not use unified IO,
@@ skipping 37 matching lines @@
   // Proceed with device authorization after translating device ID.
   void OnDeviceIDTranslated(int stream_id,
                             bool device_found,
                             const AudioOutputDeviceInfo& device_info);
 
   // Start the actual creation of an audio stream, after the device
   // authorization process is complete.
   void DoCreateStream(int stream_id,
                       int render_frame_id,
                       const media::AudioParameters& params,
-                      const std::string& device_unique_id);
+                      const std::string& device_unique_id,
+                      bool render_frame_is_valid);
 
   // Complete the process of creating an audio stream. This will set up the
   // shared memory or shared socket in low latency mode and send the
   // NotifyStreamCreated message to the peer.
   void DoCompleteCreation(int stream_id);
 
   // Send playing/paused status to the renderer.
   void DoNotifyStreamStateChanged(int stream_id, bool is_playing);
 
   RenderProcessHost::AudioOutputControllerList DoGetOutputControllers() const;
@@ skipping 30 matching lines @@
   // Translate the hashed |device_id| to a unique device ID.
   void TranslateDeviceID(const std::string& device_id,
                          const url::Origin& security_origin,
                          const OutputDeviceInfoCB& callback,
                          const AudioOutputDeviceEnumeration& enumeration);
 
   // Helper method to check if the authorization procedure for stream
   // |stream_id| has started.
   bool IsAuthorizationStarted(int stream_id);
 
+  // Called from AudioRendererHostTest to override the function that checks for
+  // the existence of the render frame at stream creation time.
+  void set_render_frame_id_validate_function_for_testing(
+      ValidateRenderFrameIdFunction function) {
+    validate_render_frame_id_function_ = function;
+  }
+
   // ID of the RenderProcessHost that owns this instance.
   const int render_process_id_;
 
   media::AudioManager* const audio_manager_;
   AudioMirroringManager* const mirroring_manager_;
   std::unique_ptr<media::AudioLog> audio_log_;
 
   // Used to access to AudioInputDeviceManager.
   MediaStreamManager* media_stream_manager_;
 
@@ skipping 10 matching lines @@
   // Map of device authorizations for streams that are not yet created
   // The key is the stream ID, and the value is a pair. The pair's first element
   // is a bool that is true if the authorization process completes successfully.
   // The second element contains the unique ID of the authorized device.
   std::map<int, std::pair<bool, std::string>> authorizations_;
 
   // The maximum number of simultaneous streams during the lifetime of this
   // host. Reported as UMA stat at shutdown.
   size_t max_simultaneous_streams_;
 
+  // Function to use to validate render frame IDs. This is only overridden for
+  // testing.
+  ValidateRenderFrameIdFunction validate_render_frame_id_function_;
+
   DISALLOW_COPY_AND_ASSIGN(AudioRendererHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_RENDERER_HOST_H_