SearchProviderInstallStateImpl: remove dead code

chrome/browser/search_engines/search_provider_install_state_impl.cc

 // Copyright (c) 2012 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 "chrome/browser/search_engines/search_provider_install_state_impl.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "chrome/browser/google/google_url_tracker_factory.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 18 matching lines @@
       weak_factory_(this) {
   // This is initialized by RenderProcessHostImpl. Do not add any non-trivial
   // initialization here. Instead do it lazily when required.
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 }
 
 SearchProviderInstallStateImpl::~SearchProviderInstallStateImpl() {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 }
 
-// Register the given interface impl. The impl is owned by the host. Messages
-// will be dispatched on |task_runner| (or on the default task runner if not
-// given). The impl will also be deleted on |task_runner|.
-template <typename InterfaceImpl>
-void InstallService2(
-    content::RenderProcessHost* host,
-    std::unique_ptr<InterfaceImpl> impl,
-    const scoped_refptr<base::SingleThreadTaskRunner>& task_runner = nullptr) {
-  host->AddOwnedInterface(std::move(impl), task_runner);
-}
-
 void SearchProviderInstallStateImpl::Bind(
     chrome::mojom::SearchProviderInstallStateRequest request) {
   binding_set_.AddBinding(this, std::move(request));
 }
 
 chrome::mojom::InstallState
 SearchProviderInstallStateImpl::GetSearchProviderInstallState(
     const GURL& page_location,
     const GURL& requested_host) {
   GURL requested_origin = requested_host.GetOrigin();
@@ skipping 35 matching lines @@
 
 void SearchProviderInstallStateImpl::ReplyWithProviderInstallState(
     const GURL& page_location,
     const GURL& requested_host,
     const GetInstallStateCallback& callback) {
   chrome::mojom::InstallState install_state =
       GetSearchProviderInstallState(page_location, requested_host);
 
   callback.Run(install_state);
 }