Fix places that trigger no-unused-lambda-capture

webrtc/modules/audio_processing/aec3/adaptive_fir_filter_unittest.cc

 /*
  *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 319 matching lines @@
     DelayBuffer<float> delay_buffer(delay_samples);
     CascadedBiQuadFilter x_hp_filter(kHighPassFilterCoefficients, 1);
     CascadedBiQuadFilter y_hp_filter(kHighPassFilterCoefficients, 1);
 
     SCOPED_TRACE(ProduceDebugText(delay_samples));
     for (size_t k = 0; k < kNumBlocksToProcess; ++k) {
       RandomizeSampleVector(&random_generator, x[0]);
       delay_buffer.Delay(x[0], y);
 
       RandomizeSampleVector(&random_generator, n);
-      constexpr float kNoiseScaling = 1.f / 100.f;
+      const float kNoiseScaling = 1.f / 100.f;
       std::transform(
           y.begin(), y.end(), n.begin(), y.begin(),
           [kNoiseScaling](float a, float b) { return a + b * kNoiseScaling; });
 
       x_hp_filter.Process(x[0]);
       y_hp_filter.Process(y);
 
       render_buffer.Insert(x);
       render_signal_analyzer.Update(render_buffer, aec_state.FilterDelay());
 
@@ skipping 19 matching lines @@
     }
     // Verify that the filter is able to perform well.
     EXPECT_LT(1000 * std::inner_product(e.begin(), e.end(), e.begin(), 0.f),
               std::inner_product(y.begin(), y.end(), y.begin(), 0.f));
     ASSERT_TRUE(aec_state.FilterDelay());
     EXPECT_EQ(delay_samples / kBlockSize, *aec_state.FilterDelay());
   }
 }
 }  // namespace aec3
 }  // namespace webrtc