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

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=mastiz@chromium.org

Bug: 1042208
Change-Id: If00ecce091d5f71b8d55e7197d71b5ed75e70727
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2007641
Auto-Submit: Sylvain Defresne <sdefresne@chromium.org>
Reviewed-by: Mikel Astiz <mastiz@chromium.org>
Commit-Queue: Mikel Astiz <mastiz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#733537}

ios/chrome/browser/sync/device_info_sync_service_factory.h

@@ -10,6 +10,7 @@
 
 #include "base/macros.h"
 #include "components/keyed_service/ios/browser_state_keyed_service_factory.h"
+#include "ios/chrome/browser/browser_state/chrome_browser_state_forward.h"
 
 namespace base {
 template <typename T>
@@ -21,10 +22,6 @@ class DeviceInfoSyncService;
 class DeviceInfoTracker;
 }  // namespace syncer
 
-namespace ios {
-class ChromeBrowserState;
-}  // namespace ios
-
 // Singleton that owns all DeviceInfoSyncService and associates them with
 // ios::ChromeBrowserState.
 class DeviceInfoSyncServiceFactory : public BrowserStateKeyedServiceFactory {

ios/chrome/browser/sync/ios_chrome_sync_client.h

@@ -12,15 +12,12 @@
 #include "base/memory/weak_ptr.h"
 #include "base/single_thread_task_runner.h"
 #include "components/browser_sync/browser_sync_client.h"
+#include "ios/chrome/browser/browser_state/chrome_browser_state_forward.h"
 
 namespace autofill {
 class AutofillWebDataService;
 }
 
-namespace ios {
-class ChromeBrowserState;
-}
-
 namespace password_manager {
 class PasswordStore;
 }

ios/chrome/browser/sync/ios_user_event_service_factory.h

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

ios/chrome/browser/sync/model_type_store_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 syncer {
 class ModelTypeStoreService;
 }  // namespace syncer
 
-namespace ios {
-class ChromeBrowserState;
-}  // namespace ios
-
 // Singleton that owns all ModelTypeStoreService and associates them with
 // ios::ChromeBrowserState.
 class ModelTypeStoreServiceFactory : public BrowserStateKeyedServiceFactory {

ios/chrome/browser/sync/profile_sync_service_factory.h

@@ -10,16 +10,13 @@
 #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 syncer {
 class ProfileSyncService;
 class SyncService;
 }  // namespace syncer
 
-namespace ios {
-class ChromeBrowserState;
-}  // namespace ios
-
 // Singleton that owns all SyncServices and associates them with
 // ios::ChromeBrowserState.
 class ProfileSyncServiceFactory : public BrowserStateKeyedServiceFactory {

ios/chrome/browser/sync/send_tab_to_self_sync_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 send_tab_to_self {
 class SendTabToSelfSyncService;
 }  // namespace send_tab_to_self
 
-namespace ios {
-class ChromeBrowserState;
-}  // namespace ios
-
 // Singleton that owns all SendTabToSelfSyncService and associates them with
 // ios::ChromeBrowserState.
 class SendTabToSelfSyncServiceFactory : public BrowserStateKeyedServiceFactory {

ios/chrome/browser/sync/session_sync_service_factory.h

@@ -10,6 +10,7 @@
 #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 GURL;
 
@@ -17,10 +18,6 @@ namespace sync_sessions {
 class SessionSyncService;
 }  // namespace sync_sessions
 
-namespace ios {
-class ChromeBrowserState;
-}  // namespace ios
-
 // Singleton that owns all SessionSyncService and associates them with
 // ios::ChromeBrowserState.
 class SessionSyncServiceFactory : public BrowserStateKeyedServiceFactory {

ios/chrome/browser/sync/sessions/ios_chrome_local_session_event_router.h

@@ -14,16 +14,13 @@
 #include "base/macros.h"
 #include "components/sync/model/syncable_service.h"
 #include "components/sync_sessions/local_session_event_router.h"
+#include "ios/chrome/browser/browser_state/chrome_browser_state_forward.h"
 #import "ios/chrome/browser/tabs/tab_model_list_observer.h"
 #include "ios/chrome/browser/web_state_list/web_state_list_observer.h"
 #include "ios/web/public/web_state_observer.h"
 
 class GURL;
 
-namespace ios {
-class ChromeBrowserState;
-}
-
 namespace sync_sessions {
 class SyncSessionsClient;
 }

ios/chrome/browser/sync/sync_setup_service_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 SyncSetupService;
 
-namespace ios {
-class ChromeBrowserState;
-}
-
 // Singleton that owns all SyncSetupServices and associates them with
 // BrowserStates.
 class SyncSetupServiceFactory : public BrowserStateKeyedServiceFactory {