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diff --git a/chromium/third_party/blink/renderer/platform/mediastream/media_stream_web_audio_source.h b/chromium/third_party/blink/renderer/platform/mediastream/media_stream_web_audio_source.h
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+++ b/chromium/third_party/blink/renderer/platform/mediastream/media_stream_web_audio_source.h
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+/*
+ * Copyright 2014 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer
+ *    in the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name of Ericsson nor the names of its contributors
+ *    may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_MEDIASTREAM_MEDIA_STREAM_WEB_AUDIO_SOURCE_H_
+#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_MEDIASTREAM_MEDIA_STREAM_WEB_AUDIO_SOURCE_H_
+
+#include <memory>
+#include <utility>
+
+#include "base/memory/ptr_util.h"
+#include "third_party/blink/renderer/platform/audio/audio_source_provider.h"
+#include "third_party/blink/renderer/platform/wtf/noncopyable.h"
+#include "third_party/blink/renderer/platform/wtf/threading_primitives.h"
+
+namespace blink {
+
+class WebAudioSourceProvider;
+
+class MediaStreamWebAudioSource : public AudioSourceProvider {
+  WTF_MAKE_NONCOPYABLE(MediaStreamWebAudioSource);
+
+ public:
+  static std::unique_ptr<MediaStreamWebAudioSource> Create(
+      std::unique_ptr<WebAudioSourceProvider> provider) {
+    return base::WrapUnique(new MediaStreamWebAudioSource(std::move(provider)));
+  }
+
+  ~MediaStreamWebAudioSource() override;
+
+ private:
+  explicit MediaStreamWebAudioSource(std::unique_ptr<WebAudioSourceProvider>);
+
+  // blink::AudioSourceProvider implementation.
+  void ProvideInput(AudioBus*, size_t frames_to_process) override;
+
+  std::unique_ptr<WebAudioSourceProvider> web_audio_source_provider_;
+};
+
+}  // namespace blink
+
+#endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_MEDIASTREAM_MEDIA_STREAM_WEB_AUDIO_SOURCE_H_