Privatize StrongBinding lifetime management

components/contextual_search/renderer/overlay_page_notifier_service_impl.cc

 // Copyright 2015 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.
 
 #include "components/contextual_search/renderer/overlay_page_notifier_service_impl.h"
 
 #include <utility>
 
 #include "components/contextual_search/renderer/overlay_js_render_frame_observer.h"
 
 namespace contextual_search {
 
 OverlayPageNotifierServiceImpl::OverlayPageNotifierServiceImpl(
-    base::WeakPtr<OverlayJsRenderFrameObserver> observer,
-    mojo::InterfaceRequest<mojom::OverlayPageNotifierService> request)
-    : binding_(this, std::move(request)), overlay_js_observer_(observer) {}
+    base::WeakPtr<OverlayJsRenderFrameObserver> observer)
+    : overlay_js_observer_(observer) {}
 
 OverlayPageNotifierServiceImpl::~OverlayPageNotifierServiceImpl() {}
 
 void OverlayPageNotifierServiceImpl::NotifyIsContextualSearchOverlay() {
   if (overlay_js_observer_ != nullptr)
     overlay_js_observer_->SetIsContextualSearchOverlay();
 }
 
 }  // namespace contextual_search