[Proximity Auth] Create one ProximityAuthClient per profile, rather than one global one.

chrome/browser/signin/proximity_auth_facade.cc

Index: chrome/browser/signin/proximity_auth_facade.cc
diff --git a/chrome/browser/signin/proximity_auth_facade.cc b/chrome/browser/signin/proximity_auth_facade.cc
index bef11432ff50e1d4b97580820f0a1517ae330ed6..71de2e8c3f792a308daba7b7ea9de1d04dcfd92a 100644
--- a/chrome/browser/signin/proximity_auth_facade.cc
+++ b/chrome/browser/signin/proximity_auth_facade.cc
@@ -5,46 +5,10 @@
 #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 {
@@ -57,10 +21,9 @@ class ProximityAuthFacade {
   friend struct base::DefaultLazyInstanceTraits<ProximityAuthFacade>;
   friend struct base::DefaultDeleter<ProximityAuthFacade>;
 
-  ProximityAuthFacade() : screenlock_bridge_(&proximity_auth_client_) {}
+  ProximityAuthFacade() {}
   ~ProximityAuthFacade() {}
 
-  ChromeProximityAuthClient proximity_auth_client_;
   proximity_auth::ScreenlockBridge screenlock_bridge_;
 
   DISALLOW_COPY_AND_ASSIGN(ProximityAuthFacade);