Clean Identity Manager presubmit checks in //chromeos

After the IdentityManager code restructing into public and internal APIs
was fixed in https://crbug.com/952788, this CL fixes both build
dependencies and presubmit checks in //chromeos.

Bug: 970268
Change-Id: Ie9f0f14682ae32002be314751f0b66f2efc03404
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1712575
Commit-Queue: Henrique Ferreiro <hferreiro@igalia.com>
Reviewed-by: Colin Blundell <blundell@chromium.org>
Reviewed-by: Ryan Hansberry <hansberry@chromium.org>
Cr-Commit-Position: refs/heads/master@{#680216}

chromeos/services/device_sync/BUILD.gn

@@ -126,6 +126,7 @@ static_library("device_sync") {
     "//chromeos/components/multidevice",
     "//chromeos/components/multidevice/logging",
     "//chromeos/services/device_sync/public/mojom",
+    "//components/signin/public/identity_manager",
     "//services/network/public/cpp",
     "//services/service_manager/public/cpp",
   ]
@@ -141,7 +142,6 @@ static_library("device_sync") {
     "//chromeos/services/device_sync/public/cpp",
     "//chromeos/services/device_sync/public/mojom",
     "//components/gcm_driver",
-    "//components/signin/public/identity_manager",
     "//net",
     "//services/preferences/public/cpp",
     "//services/service_manager/public/cpp",

chromeos/services/device_sync/DEPS

@@ -2,7 +2,6 @@ include_rules = [
   "+components/cryptauth",
   "+components/gcm_driver",
   "+components/proximity_auth/logging",
-  "+components/signin/core/browser",
   "+components/signin/public",
   "+components/version_info",
   "+google_apis/gaia",

chromeos/services/device_sync/cryptauth_client_impl.cc

@@ -14,6 +14,7 @@
 #include "chromeos/services/device_sync/proto/cryptauth_enrollment.pb.h"
 #include "chromeos/services/device_sync/proto/cryptauth_proto_to_query_parameters_util.h"
 #include "chromeos/services/device_sync/switches.h"
+#include "components/signin/public/identity_manager/access_token_info.h"
 #include "components/signin/public/identity_manager/identity_manager.h"
 #include "components/signin/public/identity_manager/primary_account_access_token_fetcher.h"
 #include "services/network/public/cpp/shared_url_loader_factory.h"

chromeos/services/device_sync/cryptauth_client_impl.h

@@ -15,10 +15,10 @@
 #include "chromeos/services/device_sync/cryptauth_api_call_flow.h"
 #include "chromeos/services/device_sync/cryptauth_client.h"
 #include "chromeos/services/device_sync/proto/cryptauth_api.pb.h"
-#include "components/signin/public/identity_manager/access_token_info.h"
 #include "net/traffic_annotation/network_traffic_annotation.h"
 
 namespace signin {
+struct AccessTokenInfo;
 class IdentityManager;
 class PrimaryAccountAccessTokenFetcher;
 }  // namespace signin