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

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=marq@chromium.org

Bug: 1042208
Change-Id: I1349bdd47e3b14b023bf292539822cb22a37a0ae
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2007287
Auto-Submit: Sylvain Defresne <sdefresne@chromium.org>
Reviewed-by: Mark Cogan <marq@chromium.org>
Commit-Queue: Sylvain Defresne <sdefresne@chromium.org>
Cr-Commit-Position: refs/heads/master@{#733372}

ios/chrome/browser/url_loading/app_url_loading_service.h

@@ -11,16 +11,13 @@
 #include "base/ios/block_types.h"
 #import "ios/chrome/app/application_delegate/tab_opening.h"
 #include "ios/chrome/app/application_mode.h"
+#include "ios/chrome/browser/browser_state/chrome_browser_state_forward.h"
 #include "ui/base/page_transition_types.h"
 
 struct UrlLoadParams;
 
 @class TabModel;
 
-namespace ios {
-class ChromeBrowserState;
-}
-
 // Objective-C delegate for AppUrlLoadingService.
 @protocol AppURLLoadingServiceDelegate
 

ios/chrome/browser/url_loading/test_app_url_loading_service.h

@@ -5,13 +5,10 @@
 #ifndef IOS_CHROME_BROWSER_URL_LOADING_TEST_APP_URL_LOADING_SERVICE_H_
 #define IOS_CHROME_BROWSER_URL_LOADING_TEST_APP_URL_LOADING_SERVICE_H_
 
+#include "ios/chrome/browser/browser_state/chrome_browser_state_forward.h"
 #include "ios/chrome/browser/url_loading/app_url_loading_service.h"
 #import "ios/chrome/browser/url_loading/url_loading_params.h"
 
-namespace ios {
-class ChromeBrowserState;
-}
-
 // Service used to manage url loading at application level.
 class TestAppUrlLoadingService : public AppUrlLoadingService {
  public:

ios/chrome/browser/url_loading/url_loading_notifier_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;
-}
+#include "ios/chrome/browser/browser_state/chrome_browser_state_forward.h"
 
 class UrlLoadingNotifier;
 

ios/chrome/browser/url_loading/url_loading_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;
-}
+#include "ios/chrome/browser/browser_state/chrome_browser_state_forward.h"
 
 class UrlLoadingService;
 

ios/chrome/browser/url_loading/url_loading_util.h

@@ -8,12 +8,11 @@
 #import <Foundation/Foundation.h>
 
 #include "components/sessions/core/session_id.h"
+#include "ios/chrome/browser/browser_state/chrome_browser_state_forward.h"
 #include "ui/base/window_open_disposition.h"
 
 class GURL;
-namespace ios {
-class ChromeBrowserState;
-}
+
 namespace web {
 class WebState;
 }