Fix use-after-scope issue in audio_renderer_impl.

media/renderers/audio_renderer_impl.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 "media/renderers/audio_renderer_impl.h"
 
 #include <math.h>
 #include <stddef.h>
 #include <algorithm>
 #include <utility>
@@ skipping 326 matching lines @@
   DCHECK_EQ(kUninitialized, state_);
   DCHECK(sink_.get());
 
   state_ = kInitializing;
   client_ = client;
 
   // Always post |init_cb_| because |this| could be destroyed if initialization
   // failed.
   init_cb_ = BindToCurrentLoop(init_cb);
 
-  const AudioParameters& hw_params =
-      sink_->GetOutputDeviceInfo().output_params();
+  auto output_device_info = sink_->GetOutputDeviceInfo();
+  const AudioParameters& hw_params = output_device_info.output_params();
   expecting_config_changes_ = stream->SupportsConfigChanges();
   if (!expecting_config_changes_ || !hw_params.IsValid() ||
       hw_params.format() == AudioParameters::AUDIO_FAKE) {
     // The actual buffer size is controlled via the size of the AudioBus
     // provided to Render(), but we should choose a value here based on hardware
     // parameters if possible since it affects the initial buffer size used by
     // the algorithm. Too little will cause underflow on Bluetooth devices.
     int buffer_size =
         std::max(stream->audio_decoder_config().samples_per_second() / 100,
                  hw_params.IsValid() ? hw_params.frames_per_buffer() : 0);
@@ skipping 627 matching lines @@
   // All channels with a zero mix are muted and can be ignored.
   std::vector<bool> channel_mask(audio_parameters_.channels(), false);
   for (size_t ch = 0; ch < matrix.size(); ++ch) {
     channel_mask[ch] = std::any_of(matrix[ch].begin(), matrix[ch].end(),
                                    [](float mix) { return !!mix; });
   }
   algorithm_->SetChannelMask(std::move(channel_mask));
 }
 
 }  // namespace media