[Signin]: Remove GetUnconsentedPrimaryAccountInfo.

This CL contributes to changing the API to get the primary account from
the identity manager to be consent-aware.
|GetUnconsentedPrimaryAccountInfo| is replaced with
|GetPrimaryAccountInfo(ConsentLevel::kNotRequired)|.

TBR=treib@chromium.org,dvadym@chromium.org,hashimoto@chromium.org

Bug: 1046746
Change-Id: I65e69e27ffafbcaab950ea7de4a9f69c7c35328b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2039510
Commit-Queue: Monica Basta <msalama@chromium.org>
Reviewed-by: Vadym Doroshenko <dvadym@chromium.org>
Reviewed-by: Marc Treib <treib@chromium.org>
Reviewed-by: David Roger <droger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#738972}

• chrome/browser/chromeos/account_manager/account_manager_policy_controller_browsertest.cc[diff]
• chrome/browser/chromeos/arc/auth/arc_auth_service.cc[diff]
• chrome/browser/chromeos/arc/session/arc_play_store_enabled_preference_handler_unittest.cc[diff]
• chrome/browser/chromeos/assistant/assistant_util.cc[diff]
• chrome/browser/chromeos/login/session/user_session_manager.cc[diff]
• chrome/browser/chromeos/login/signin/oauth2_login_manager.cc[diff]
• chrome/browser/profiles/gaia_info_update_service.cc[diff]
• chrome/browser/profiles/profile_manager.cc[diff]
• chrome/browser/safe_browsing/advanced_protection_status_manager.cc[diff]
• chrome/browser/safe_browsing/chrome_password_protection_service.cc[diff]
• chrome/browser/signin/signin_profile_attributes_updater.cc[diff]
• chrome/browser/signin/signin_ui_util.cc[diff]
• chrome/browser/supervised_user/child_accounts/child_account_service.cc[diff]
• chrome/browser/supervised_user/supervised_user_google_auth_navigation_throttle.cc[diff]
• chrome/browser/ui/views/profiles/avatar_toolbar_button_delegate.cc[diff]
• chrome/browser/ui/views/profiles/profile_menu_view.cc[diff]
• chrome/browser/ui/webui/settings/chromeos/account_manager_handler.cc[diff]
• chromeos/services/assistant/service.cc[diff]
• chromeos/services/device_sync/device_sync_impl.cc[diff]
• chromeos/services/device_sync/device_sync_service_unittest.cc[diff]
• components/password_manager/core/browser/leak_detection/authenticated_leak_check.cc[diff]
• components/signin/public/identity_manager/identity_manager.cc[diff]
• components/signin/public/identity_manager/identity_manager.h[diff]
• components/signin/public/identity_manager/identity_manager_unittest.cc[diff]
• components/signin/public/identity_manager/identity_test_environment.cc[diff]
• components/signin/public/identity_manager/identity_test_utils.cc[diff]
• components/sync/driver/sync_auth_util.cc[diff]
• services/identity/DEPS[diff]
• services/identity/identity_accessor_impl.cc[diff]