[CrOS MultiDevice] Create multidevice::CryptAuthClientFactoryImpl.

This class generates CryptAuthClient objects via the IdentityManager
service. This will be used to fetch synced CryptAuth data in the
DeviceSync API.

Bug: 752273
Change-Id: I8378ea9c66eb52b2e6f061de3efea8619fed679a
Reviewed-on: https://chromium-review.googlesource.com/907631
Commit-Queue: Kyle Horimoto <khorimoto@chromium.org>
Reviewed-by: Tim Song <tengs@chromium.org>
Reviewed-by: Matt Menke <mmenke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#536776}

components/multidevice/service/BUILD.gn

@@ -10,6 +10,8 @@ if (!is_ios && !is_android) {
 
   static_library("service") {
     sources = [
+      "cryptauth_client_factory_impl.cc",
+      "cryptauth_client_factory_impl.h",
       "cryptauth_token_fetcher_impl.cc",
       "cryptauth_token_fetcher_impl.h",
       "device_sync_impl.cc",
@@ -22,6 +24,7 @@ if (!is_ios && !is_android) {
 
     deps = [
       "//base",
+      "//net",
       "//services/identity/public/cpp",
     ]
 

components/multidevice/service/DEPS

@@ -3,6 +3,7 @@ include_rules = [
   "+components/signin/core/browser",
   "+google_apis/gaia",
   "+mojo/public/cpp",
+  "+net/url_request",
   "+services/identity",
   "+services/service_manager/public/cpp",
   "+components/cryptauth"

components/multidevice/service/cryptauth_client_factory_impl.cc

+// Copyright 2018 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/multidevice/service/cryptauth_client_factory_impl.h"
+
+#include "components/cryptauth/cryptauth_client_impl.h"
+#include "components/multidevice/service/cryptauth_token_fetcher_impl.h"
+
+namespace multidevice {
+
+CryptAuthClientFactoryImpl::CryptAuthClientFactoryImpl(
+    identity::IdentityManager* identity_manager,
+    scoped_refptr<net::URLRequestContextGetter> url_request_context,
+    const cryptauth::DeviceClassifier& device_classifier)
+    : identity_manager_(identity_manager),
+      url_request_context_(std::move(url_request_context)),
+      device_classifier_(device_classifier) {}
+
+CryptAuthClientFactoryImpl::~CryptAuthClientFactoryImpl() = default;
+
+std::unique_ptr<cryptauth::CryptAuthClient>
+CryptAuthClientFactoryImpl::CreateInstance() {
+  return std::make_unique<cryptauth::CryptAuthClientImpl>(
+      std::make_unique<cryptauth::CryptAuthApiCallFlow>(),
+      std::make_unique<CryptAuthAccessTokenFetcherImpl>(identity_manager_),
+      url_request_context_, device_classifier_);
+}
+
+}  // namespace multidevice

components/multidevice/service/cryptauth_client_factory_impl.h

+// Copyright 2018 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_MULTIDEVICE_CRYPTAUTH_CLIENT_FACTORY_IMPL
+#define COMPONENTS_MULTIDEVICE_CRYPTAUTH_CLIENT_FACTORY_IMPL
+
+#include "base/memory/ref_counted.h"
+#include "components/cryptauth/cryptauth_client.h"
+#include "components/cryptauth/proto/cryptauth_api.pb.h"
+
+namespace identity {
+class IdentityManager;
+}  // namespace identity
+
+namespace net {
+class URLRequestContextGetter;
+}  // namespace net
+
+namespace multidevice {
+
+// CryptAuthClientFactory implementation which utilizes IdentityManager.
+class CryptAuthClientFactoryImpl : public cryptauth::CryptAuthClientFactory {
+ public:
+  CryptAuthClientFactoryImpl(
+      identity::IdentityManager* identity_manager,
+      scoped_refptr<net::URLRequestContextGetter> url_request_context,
+      const cryptauth::DeviceClassifier& device_classifier);
+  ~CryptAuthClientFactoryImpl() override;
+
+  // cryptauth::CryptAuthClientFactory:
+  std::unique_ptr<cryptauth::CryptAuthClient> CreateInstance() override;
+
+ private:
+  identity::IdentityManager* identity_manager_;
+  const scoped_refptr<net::URLRequestContextGetter> url_request_context_;
+  const cryptauth::DeviceClassifier device_classifier_;
+};
+
+}  // namespace multidevice
+
+#endif  // COMPONENTS_MULTIDEVICE_CRYPTAUTH_CLIENT_FACTORY_IMPL