Add WebThread in AudioDestination to support AudioWorkletThread

third_party/WebKit/Source/platform/audio/PushPullFIFOTest.cpp

 // Copyright 2017 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 "platform/audio/PushPullFIFO.h"
 
 #include <memory>
 #include <vector>
 #include "platform/audio/AudioUtilities.h"
 #include "platform/testing/TestingPlatformSupport.h"
@@ skipping 151 matching lines @@
   const PushPullFIFOStateForTest actualState = fifo->getStateForTest();
 
   // Verify the read/write indexes.
   EXPECT_EQ(expectedState.indexRead, actualState.indexRead);
   EXPECT_EQ(expectedState.indexWrite, actualState.indexWrite);
   EXPECT_EQ(expectedState.overflowCount, actualState.overflowCount);
   EXPECT_EQ(expectedState.underflowCount, actualState.underflowCount);
 
   // Verify in-FIFO samples.
   for (const auto& sample : expectedState.fifoSamples) {
-    EXPECT_TRUE(verifyBusValueAtIndex(fifo->bus(), sample.index, sample.value));
+    EXPECT_TRUE(verifyBusValueAtIndex(fifo->getFIFOBusForTest(), sample.index,
+                                      sample.value));
   }
 
   // Verify samples from the most recent output bus.
   for (const auto& sample : expectedState.outputSamples) {
     EXPECT_TRUE(
         verifyBusValueAtIndex(outputBus.get(), sample.index, sample.value));
   }
 }
 
 FIFOTestParam featureTestParams[] = {
@@ skipping 171 matching lines @@
      // - Output bus samples (index, expectedValue) = (0, 0), (143, 0)
      {0, 0, 0, 4, {{0, 0}, {1023, 0}}, {{0, 0}, {143, 0}}}}};
 
 INSTANTIATE_TEST_CASE_P(PushPullFIFOFeatureTest,
                         PushPullFIFOFeatureTest,
                         ::testing::ValuesIn(featureTestParams));
 
 }  // namespace
 
 }  // namespace blink