Switch from Delegate to Observer.

components/arc/test/fake_arc_bridge_bootstrap.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 COMPONENTS_ARC_TEST_FAKE_ARC_BRIDGE_BOOTSTRAP_H_
 #define COMPONENTS_ARC_TEST_FAKE_ARC_BRIDGE_BOOTSTRAP_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "components/arc/arc_bridge_bootstrap.h"
-#include "components/arc/test/fake_arc_bridge_instance.h"
 
 namespace arc {
 
 // A fake ArcBridgeBootstrap that creates a local connection.
 class FakeArcBridgeBootstrap : public ArcBridgeBootstrap {
  public:
   FakeArcBridgeBootstrap();
   ~FakeArcBridgeBootstrap() override;
 
   // ArcBridgeBootstrap:
@@ skipping 12 matching lines @@
   // Emulate Start() is suspended at some phase, before OnReady() is invoked.
   void SuspendBoot();
 
   // Returns FakeArcBridgeBootstrap instance. This can be used for a factory
   // in ArcBridgeServiceImpl.
   static std::unique_ptr<ArcBridgeBootstrap> Create();
 
  private:
   bool boot_failure_emulation_enabled_ = false;
   ArcBridgeService::StopReason boot_failure_reason_;
-  FakeArcBridgeInstance instance_;
 
   bool boot_suspended_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(FakeArcBridgeBootstrap);
 };
 
 }  // namespace arc
 
 #endif  // COMPONENTS_ARC_TEST_FAKE_ARC_BRIDGE_BOOTSTRAP_H_