Change sync primitives ownership for audio rendering.

content/browser/renderer_host/media/audio_renderer_host_unittest.cc

 // 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.
 
 #include "content/browser/renderer_host/media/audio_renderer_host.h"
 
 #include <stdint.h>
 
 #include <memory>
 
@@ skipping 91 matching lines @@
 
  private:
   virtual ~MockAudioRendererHost() {
     // Make sure all audio streams have been deleted.
     EXPECT_TRUE(audio_entries_.empty());
   }
 
   // This method is used to dispatch IPC messages to the renderer. We intercept
   // these messages here and dispatch to our mock methods to verify the
   // conversation between this object and the renderer.
+  // Note: this means that file descriptors won't be duplicated,
+  // leading to double-close errors from SyncSocket.
+  // See crbug.com/647659.
   virtual bool Send(IPC::Message* message) {
     CHECK(message);
 
     // In this method we dispatch the messages to the according handlers as if
     // we are the renderer.
     bool handled = true;
     IPC_BEGIN_MESSAGE_MAP(MockAudioRendererHost, *message)
       IPC_MESSAGE_HANDLER(AudioMsg_NotifyDeviceAuthorized,
                           OnNotifyDeviceAuthorized)
       IPC_MESSAGE_HANDLER(AudioMsg_NotifyStreamCreated,
@@ skipping 320 matching lines @@
 }
 
 TEST_F(AudioRendererHostTest, CreateFailsForInvalidRenderFrame) {
   CreateWithInvalidRenderFrameId();
   Close();
 }
 
 // TODO(hclam): Add tests for data conversation in low latency mode.
 
 }  // namespace content