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diff --git a/chromium/components/viz/service/frame_sinks/external_begin_frame_source_mojo.h b/chromium/components/viz/service/frame_sinks/external_begin_frame_source_mojo.h
new file mode 100644
index 00000000000..b489a8036a7
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+++ b/chromium/components/viz/service/frame_sinks/external_begin_frame_source_mojo.h
@@ -0,0 +1,55 @@
+// Copyright 2018 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.
+
+#ifndef COMPONENTS_VIZ_SERVICE_FRAME_SINKS_EXTERNAL_BEGIN_FRAME_SOURCE_MOJO_H_
+#define COMPONENTS_VIZ_SERVICE_FRAME_SINKS_EXTERNAL_BEGIN_FRAME_SOURCE_MOJO_H_
+
+#include <memory>
+
+#include "components/viz/common/frame_sinks/begin_frame_args.h"
+#include "components/viz/common/frame_sinks/begin_frame_source.h"
+#include "components/viz/service/display/display.h"
+#include "mojo/public/cpp/bindings/associated_binding.h"
+#include "services/viz/privileged/interfaces/compositing/external_begin_frame_controller.mojom.h"
+
+namespace viz {
+
+// Implementation of ExternalBeginFrameSource that's controlled by IPCs over
+// the mojom::ExternalBeginFrameController interface. Replaces the Display's
+// default BeginFrameSource. Observes the Display to be notified of BeginFrame
+// completion.
+class VIZ_SERVICE_EXPORT ExternalBeginFrameSourceMojo
+    : public mojom::ExternalBeginFrameController,
+      public ExternalBeginFrameSourceClient,
+      public DisplayObserver,
+      public ExternalBeginFrameSource {
+ public:
+  ExternalBeginFrameSourceMojo(
+      mojom::ExternalBeginFrameControllerAssociatedRequest controller_request,
+      mojom::ExternalBeginFrameControllerClientPtr client);
+  ~ExternalBeginFrameSourceMojo() override;
+
+  // mojom::ExternalBeginFrameController implementation.
+  void IssueExternalBeginFrame(const BeginFrameArgs& args) override;
+
+  void SetDisplay(Display* display);
+
+ private:
+  // ExternalBeginFrameSourceClient implementation.
+  void OnNeedsBeginFrames(bool needs_begin_frames) override;
+
+  // DisplayObserver implementation.
+  void OnDisplayDidFinishFrame(const BeginFrameAck& ack) override;
+  void OnDisplayDestroyed() override;
+
+  mojo::AssociatedBinding<mojom::ExternalBeginFrameController> binding_;
+  mojom::ExternalBeginFrameControllerClientPtr client_;
+
+  bool needs_begin_frames_ = false;
+  Display* display_ = nullptr;
+};
+
+}  // namespace viz
+
+#endif  // COMPONENTS_VIZ_SERVICE_FRAME_SINKS_EXTERNAL_BEGIN_FRAME_SOURCE_MOJO_H_