Remove unused include in sequenced_worker_pool.h

cc/test/fake_remote_compositor_bridge.h

 // Copyright 2016 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 CC_TEST_FAKE_REMOTE_COMPOSITOR_BRIDGE_H_
 #define CC_TEST_FAKE_REMOTE_COMPOSITOR_BRIDGE_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
+#include "base/single_thread_task_runner.h"
 #include "cc/blimp/compositor_proto_state.h"
 #include "cc/blimp/remote_compositor_bridge.h"
 
 namespace cc {
 
 // An implementation of the RemoteCompositorBridge for tests that pump
 // BeginMainFrames as soon as the client requests them.
 class FakeRemoteCompositorBridge : public RemoteCompositorBridge {
  public:
   FakeRemoteCompositorBridge(
       scoped_refptr<base::SingleThreadTaskRunner> compositor_main_task_runner);
   ~FakeRemoteCompositorBridge() override;
 
   // RemoteCompositorBridge implementation.
   void BindToClient(RemoteCompositorBridgeClient* client) override;
   void ScheduleMainFrame() override;
   void ProcessCompositorStateUpdate(
       std::unique_ptr<CompositorProtoState> compositor_proto_state) override {}
 
  protected:
   void BeginMainFrame();
 
   RemoteCompositorBridgeClient* client_;
   base::WeakPtrFactory<FakeRemoteCompositorBridge> weak_factory_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_FAKE_REMOTE_COMPOSITOR_BRIDGE_H_