Revert of Host-side implementation of ARC Intent handler

chrome/browser/chromeos/arc/arc_intent_helper_bridge_impl.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 CHROME_BROWSER_CHROMEOS_ARC_ARC_INTENT_HELPER_BRIDGE_IMPL_H_
-#define CHROME_BROWSER_CHROMEOS_ARC_ARC_INTENT_HELPER_BRIDGE_IMPL_H_
-
-#include "base/macros.h"
-#include "components/arc/arc_bridge_service.h"
-#include "components/arc/common/intent_helper.mojom.h"
-#include "components/arc/intent_helper/arc_intent_helper_bridge.h"
-#include "mojo/public/cpp/bindings/binding.h"
-
-namespace arc {
-
-// Receives intents from ARC.
-class ArcIntentHelperBridgeImpl : public ArcIntentHelperBridge,
-                                  public ArcBridgeService::Observer,
-                                  public IntentHelperHost {
- public:
-  ArcIntentHelperBridgeImpl();
-  ~ArcIntentHelperBridgeImpl() override;
-
-  // Starts listening to state changes of the ArcBridgeService.
-  // This must be called before the bridge service starts bootstrapping.
-  void StartObservingBridgeServiceChanges() override;
-
-  // ArcBridgeService::Observer
-  void OnIntentHelperInstanceReady() override;
-
-  // arc::IntentHelperHost
-  void OnOpenUrl(const mojo::String& url) override;
-
- private:
-  mojo::Binding<IntentHelperHost> binding_;
-
-  DISALLOW_COPY_AND_ASSIGN(ArcIntentHelperBridgeImpl);
-};
-
-}  // namespace arc
-
-#endif  // CHROME_BROWSER_CHROMEOS_ARC_ARC_INTENT_HELPER_BRIDGE_IMPL_H_