Move screenlock_bridge to components/proximity_auth

chrome/browser/signin/proximity_auth_facade.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 "chrome/browser/signin/proximity_auth_facade.h"
+
+#include "base/lazy_instance.h"
+#include "base/logging.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/profiles/profile_window.h"
+#include "chrome/browser/signin/signin_manager_factory.h"
+#include "components/proximity_auth/proximity_auth_client.h"
+#include "components/proximity_auth/screenlock_bridge.h"
+#include "components/signin/core/browser/signin_manager_base.h"
+
+namespace {
+
+// A Chrome-specific implementation of the ProximityAuthClient.
+class ChromeProximityAuthClient : public proximity_auth::ProximityAuthClient {
+ public:
+  ChromeProximityAuthClient() {}
+  ~ChromeProximityAuthClient() override {}
+
+  // proximity_auth::ProximityAuthClient implementation:
+  std::string GetAuthenticatedUsername(
+      content::BrowserContext* browser_context) const override;
+  void Lock(content::BrowserContext* browser_context) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ChromeProximityAuthClient);
+};
+
+std::string ChromeProximityAuthClient::GetAuthenticatedUsername(
+    content::BrowserContext* browser_context) const {
+  Profile* profile = Profile::FromBrowserContext(browser_context);
+  const SigninManagerBase* signin_manager =
+      SigninManagerFactory::GetForProfileIfExists(profile);
+  // |profile| has to be a signed-in profile with SigninManager already
+  // created. Otherwise, just crash to collect stack.
+  DCHECK(signin_manager);
+  return signin_manager->GetAuthenticatedUsername();
+}
+
+void ChromeProximityAuthClient::Lock(content::BrowserContext* browser_context) {
+  profiles::LockProfile(Profile::FromBrowserContext(browser_context));
+}
+
+// A facade class that is the glue required to initialize and manage the
+// lifecycle of various objects of the Proximity Auth component.
+class ProximityAuthFacade {
+ public:
+  proximity_auth::ScreenlockBridge* GetScreenlockBridge() {
+    return &screenlock_bridge_;
+  }
+
+ private:
+  friend struct base::DefaultLazyInstanceTraits<ProximityAuthFacade>;
+  friend struct base::DefaultDeleter<ProximityAuthFacade>;
+
+  ProximityAuthFacade() : screenlock_bridge_(&proximity_auth_client_) {}
+  ~ProximityAuthFacade() {}
+
+  ChromeProximityAuthClient proximity_auth_client_;
+  proximity_auth::ScreenlockBridge screenlock_bridge_;
+
+  DISALLOW_COPY_AND_ASSIGN(ProximityAuthFacade);
+};
+
+base::LazyInstance<ProximityAuthFacade> g_proximity_auth_facade_instance =
+    LAZY_INSTANCE_INITIALIZER;
+
+}  // namespace
+
+proximity_auth::ScreenlockBridge* GetScreenlockBridgeInstance() {
+  return g_proximity_auth_facade_instance.Pointer()->GetScreenlockBridge();
+}