Migrate DownloadProtectionService to the IdentityManager

Replace instance of SigninManagerBase with one of IdentityManager
and update calls accordingly.

Bug: 889882
Change-Id: I4e76d223a1b8a6bc328cb97e1624d2c4d7532fae
Reviewed-on: https://chromium-review.googlesource.com/1251532Reviewed-by: Jialiu Lin <jialiul@chromium.org>
Commit-Queue: Mario Sanchez Prada <mario@igalia.com>
Cr-Commit-Position: refs/heads/master@{#595133}

chrome/browser/safe_browsing/download_protection/download_protection_service.cc

@@ -18,12 +18,11 @@
 #include "chrome/browser/safe_browsing/download_protection/download_url_sb_client.h"
 #include "chrome/browser/safe_browsing/download_protection/ppapi_download_request.h"
 #include "chrome/browser/sessions/session_tab_helper.h"
-#include "chrome/browser/signin/signin_manager_factory.h"
+#include "chrome/browser/signin/identity_manager_factory.h"
 #include "chrome/common/safe_browsing/binary_feature_extractor.h"
 #include "chrome/common/url_constants.h"
 #include "components/google/core/common/google_util.h"
 #include "components/safe_browsing/common/safebrowsing_switches.h"
-#include "components/signin/core/browser/signin_manager.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_task_traits.h"
 #include "content/public/browser/browser_thread.h"
@@ -31,6 +30,7 @@
 #include "content/public/browser/web_contents.h"
 #include "net/base/url_util.h"
 #include "net/cert/x509_util.h"
+#include "services/identity/public/cpp/identity_manager.h"
 #include "services/network/public/cpp/shared_url_loader_factory.h"
 
 using content::BrowserThread;
@@ -493,11 +493,11 @@ void DownloadProtectionService::AddReferrerChainToPPAPIClientDownloadRequest(
 void DownloadProtectionService::OnDangerousDownloadOpened(
     const download::DownloadItem* item,
     Profile* profile) {
-  const SigninManagerBase* signin_manager =
-      SigninManagerFactory::GetForProfileIfExists(profile);
-  std::string username =
-      signin_manager ? signin_manager->GetAuthenticatedAccountInfo().email
-                     : std::string();
+  identity::IdentityManager* identity_manager =
+      IdentityManagerFactory::GetForProfileIfExists(profile);
+  std::string username = identity_manager
+                             ? identity_manager->GetPrimaryAccountInfo().email
+                             : std::string();
 
   std::string raw_digest_sha256 = item->GetHash();
   extensions::SafeBrowsingPrivateEventRouterFactory::GetForProfile(profile)