[ios] Fix uses of ios::ChromeBrowserState in /ios/chrome/browser/ui/autofill

The ChromeBrowserState has been moved from the "ios" namespace
to the global namespace by http://crrev.com/c/2014913. Fix the
uses from ios::ChromeBrowserState to ChromeBrowserState.

Also remove includes of chrome_browser_state_forward.h and use
a simple forward declaration instead (since the old name is no
longer necessary).

This CL was uploaded by git cl split.

R=olivierrobin@chromium.org

Bug: 1042208
Change-Id: I7488cb81c2e655dec6aaf630009030cb82bc3bbd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2017507Reviewed-by: Olivier Robin <olivierrobin@chromium.org>
Commit-Queue: Sylvain Defresne <sdefresne@chromium.org>
Cr-Commit-Position: refs/heads/master@{#735365}

ios/chrome/browser/ui/autofill/autofill_app_interface.mm

@@ -348,7 +348,7 @@ class SaveCardInfobarEGTestHelper
 }
 
 + (void)clearProfilesStore {
-  ios::ChromeBrowserState* browserState =
+  ChromeBrowserState* browserState =
       chrome_test_util::GetOriginalBrowserState();
   autofill::PersonalDataManager* personalDataManager =
       autofill::PersonalDataManagerFactory::GetForBrowserState(browserState);
@@ -461,7 +461,7 @@ class SaveCardInfobarEGTestHelper
 
 // The PersonalDataManager instance for the current browser state.
 + (autofill::PersonalDataManager*)personalDataManager {
-  ios::ChromeBrowserState* browserState =
+  ChromeBrowserState* browserState =
       chrome_test_util::GetOriginalBrowserState();
   autofill::PersonalDataManager* personalDataManager =
       autofill::PersonalDataManagerFactory::GetForBrowserState(browserState);

ios/chrome/browser/ui/autofill/chrome_autofill_client_ios.h

@@ -39,7 +39,7 @@ namespace autofill {
 // Chrome iOS implementation of AutofillClient.
 class ChromeAutofillClientIOS : public AutofillClient {
  public:
-  ChromeAutofillClientIOS(ios::ChromeBrowserState* browser_state,
+  ChromeAutofillClientIOS(ChromeBrowserState* browser_state,
                           web::WebState* web_state,
                           infobars::InfoBarManager* infobar_manager,
                           id<AutofillClientIOSBridge> bridge,
@@ -138,7 +138,7 @@ class ChromeAutofillClientIOS : public AutofillClient {
   syncer::SyncService* sync_service_;
   PersonalDataManager* personal_data_manager_;
   AutocompleteHistoryManager* autocomplete_history_manager_;
-  ios::ChromeBrowserState* browser_state_;
+  ChromeBrowserState* browser_state_;
   web::WebState* web_state_;
   __weak id<AutofillClientIOSBridge> bridge_;
   signin::IdentityManager* identity_manager_;

ios/chrome/browser/ui/autofill/chrome_autofill_client_ios.mm

@@ -83,7 +83,7 @@ autofill::CardUnmaskPromptView* CreateCardUnmaskPromptViewBridge(
 namespace autofill {
 
 ChromeAutofillClientIOS::ChromeAutofillClientIOS(
-    ios::ChromeBrowserState* browser_state,
+    ChromeBrowserState* browser_state,
     web::WebState* web_state,
     infobars::InfoBarManager* infobar_manager,
     id<AutofillClientIOSBridge> bridge,