[ios] Use chrome_browser_state_forward.h in /ios/chrome/browser/signin

Instead of forward declaring ChromeBrowserState in the ios
namespace, use a header. This will allow moving the class
to the global namespace without having to change all the
forward declaration at the same time.

This CL was uploaded by git cl split.

R=msarda@chromium.org

Bug: 1042208
Change-Id: I0f478927d6a539c273c124437d83851e69a138b0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2010820
Auto-Submit: Sylvain Defresne <sdefresne@chromium.org>
Reviewed-by: Mihai Sardarescu <msarda@chromium.org>
Commit-Queue: Sylvain Defresne <sdefresne@chromium.org>
Cr-Commit-Position: refs/heads/master@{#733415}

ios/chrome/browser/signin/about_signin_internals_factory.h

@@ -10,13 +10,11 @@
 #include "base/macros.h"
 #include "base/no_destructor.h"
 #include "components/keyed_service/ios/browser_state_keyed_service_factory.h"
+#include "ios/chrome/browser/browser_state/chrome_browser_state_forward.h"
 
 class AboutSigninInternals;
 
 namespace ios {
-
-class ChromeBrowserState;
-
 // Singleton that owns all AboutSigninInternals and associates them with browser
 // states.
 class AboutSigninInternalsFactory : public BrowserStateKeyedServiceFactory {

ios/chrome/browser/signin/account_consistency_service_factory.h

@@ -10,13 +10,11 @@
 #include "base/macros.h"
 #include "base/no_destructor.h"
 #include "components/keyed_service/ios/browser_state_keyed_service_factory.h"
+#include "ios/chrome/browser/browser_state/chrome_browser_state_forward.h"
 
 class AccountConsistencyService;
 
 namespace ios {
-
-class ChromeBrowserState;
-
 // Singleton that creates the AccountConsistencyService(s) and associates those
 // services  with browser states.
 class AccountConsistencyServiceFactory

ios/chrome/browser/signin/account_reconcilor_factory.h

@@ -10,13 +10,11 @@
 #include "base/macros.h"
 #include "base/no_destructor.h"
 #include "components/keyed_service/ios/browser_state_keyed_service_factory.h"
+#include "ios/chrome/browser/browser_state/chrome_browser_state_forward.h"
 
 class AccountReconcilor;
 
 namespace ios {
-
-class ChromeBrowserState;
-
 // Singleton that owns all AccountReconcilors and associates them with browser
 // states.
 class AccountReconcilorFactory : public BrowserStateKeyedServiceFactory {

ios/chrome/browser/signin/authentication_service_factory.h

@@ -10,15 +10,12 @@
 #include "base/macros.h"
 #include "base/no_destructor.h"
 #include "components/keyed_service/ios/browser_state_keyed_service_factory.h"
+#include "ios/chrome/browser/browser_state/chrome_browser_state_forward.h"
 
 namespace user_prefs {
 class PrefRegistrySyncable;
 }
 
-namespace ios {
-class ChromeBrowserState;
-}
-
 class AuthenticationService;
 class AuthenticationServiceDelegate;
 

ios/chrome/browser/signin/identity_manager_factory.h

@@ -9,6 +9,7 @@
 #include "base/no_destructor.h"
 #include "base/observer_list.h"
 #include "components/keyed_service/ios/browser_state_keyed_service_factory.h"
+#include "ios/chrome/browser/browser_state/chrome_browser_state_forward.h"
 
 class IdentityManagerFactoryObserver;
 
@@ -16,10 +17,6 @@ namespace signin {
 class IdentityManager;
 }
 
-namespace ios {
-class ChromeBrowserState;
-}
-
 // Singleton that owns all IdentityManager instances and associates them with
 // BrowserStates.
 class IdentityManagerFactory : public BrowserStateKeyedServiceFactory {

ios/chrome/browser/signin/ios_chrome_signin_client.h

@@ -12,12 +12,9 @@
 #include "components/content_settings/core/browser/host_content_settings_map.h"
 #include "components/signin/ios/browser/wait_for_network_callback_helper.h"
 #include "components/signin/public/base/signin_client.h"
+#include "ios/chrome/browser/browser_state/chrome_browser_state_forward.h"
 #include "net/cookies/cookie_change_dispatcher.h"
 
-namespace ios {
-class ChromeBrowserState;
-}
-
 // Concrete implementation of SigninClient for //ios/chrome.
 class IOSChromeSigninClient : public SigninClient {
  public:

ios/chrome/browser/signin/ios_chrome_signin_status_metrics_provider_delegate.h

@@ -9,12 +9,9 @@
 
 #include "base/macros.h"
 #include "components/signin/core/browser/signin_status_metrics_provider_delegate.h"
+#include "ios/chrome/browser/browser_state/chrome_browser_state_forward.h"
 #include "ios/chrome/browser/signin/identity_manager_factory_observer.h"
 
-namespace ios {
-class ChromeBrowserState;
-}
-
 class IOSChromeSigninStatusMetricsProviderDelegate
     : public SigninStatusMetricsProviderDelegate,
       public IdentityManagerFactoryObserver {

ios/chrome/browser/signin/signin_browser_state_info_updater_factory.h

@@ -8,10 +8,7 @@
 #include "base/macros.h"
 #include "base/no_destructor.h"
 #include "components/keyed_service/ios/browser_state_keyed_service_factory.h"
-
-namespace ios {
-class ChromeBrowserState;
-}
+#include "ios/chrome/browser/browser_state/chrome_browser_state_forward.h"
 
 class SigninBrowserStateInfoUpdater;
 

ios/chrome/browser/signin/signin_client_factory.h

@@ -10,13 +10,10 @@
 #include "base/macros.h"
 #include "base/no_destructor.h"
 #include "components/keyed_service/ios/browser_state_keyed_service_factory.h"
+#include "ios/chrome/browser/browser_state/chrome_browser_state_forward.h"
 
 class SigninClient;
 
-namespace ios {
-class ChromeBrowserState;
-}
-
 // Singleton that owns all SigninClients and associates them with
 // ios::ChromeBrowserState.
 class SigninClientFactory : public BrowserStateKeyedServiceFactory {

ios/chrome/browser/signin/signin_error_controller_factory.h

@@ -10,13 +10,11 @@
 #include "base/macros.h"
 #include "base/no_destructor.h"
 #include "components/keyed_service/ios/browser_state_keyed_service_factory.h"
+#include "ios/chrome/browser/browser_state/chrome_browser_state_forward.h"
 
 class SigninErrorController;
 
 namespace ios {
-
-class ChromeBrowserState;
-
 // Singleton that owns all SigninErrorControllers and associates them with
 // ios::ChromeBrowserState.
 class SigninErrorControllerFactory : public BrowserStateKeyedServiceFactory {