[ios] Fix uses of ios::ChromeBrowserState in /ios/chrome/app/application_delegate

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=marq@chromium.org

Bug: 1042208
Change-Id: I84a18e74598f0cdabaa1b04a4953cc49903e060e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2017511
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@{#734993}

ios/chrome/app/application_delegate/app_navigation.h

@@ -8,8 +8,8 @@
 #import <Foundation/Foundation.h>
 
 #include "base/ios/block_types.h"
-#include "ios/chrome/browser/browser_state/chrome_browser_state_forward.h"
 
+class ChromeBrowserState;
 @class SettingsNavigationController;
 
 // Handles the navigation through the application.
@@ -22,7 +22,7 @@
 // Presents a SignedInAccountsViewController for |browserState| on the top view
 // controller.
 - (void)presentSignedInAccountsViewControllerForBrowserState:
-    (ios::ChromeBrowserState*)browserState;
+    (ChromeBrowserState*)browserState;
 
 // Closes the settings UI with or without animation, with an optional
 // completion block.

ios/chrome/app/application_delegate/app_state.mm

@@ -172,7 +172,7 @@ initWithBrowserLauncher:(id<BrowserLauncher>)browserLauncher
   }
   _applicationInBackground = YES;
 
-  ios::ChromeBrowserState* browserState =
+  ChromeBrowserState* browserState =
       _browserLauncher.interfaceProvider.mainInterface.browserState;
   if (browserState) {
     AuthenticationServiceFactory::GetForBrowserState(browserState)
@@ -284,7 +284,7 @@ initWithBrowserLauncher:(id<BrowserLauncher>)browserLauncher
     return;
 
   _applicationInBackground = NO;
-  ios::ChromeBrowserState* browserState =
+  ChromeBrowserState* browserState =
       _browserLauncher.interfaceProvider.mainInterface.browserState;
   if (browserState) {
     AuthenticationServiceFactory::GetForBrowserState(browserState)
@@ -311,7 +311,7 @@ initWithBrowserLauncher:(id<BrowserLauncher>)browserLauncher
                                                  .interfaceProvider];
   [memoryHelper resetForegroundMemoryWarningCount];
 
-  ios::ChromeBrowserState* currentBrowserState =
+  ChromeBrowserState* currentBrowserState =
       _browserLauncher.interfaceProvider.currentInterface.browserState;
   if ([SignedInAccountsViewController
           shouldBePresentedForBrowserState:currentBrowserState]) {
@@ -320,7 +320,7 @@ initWithBrowserLauncher:(id<BrowserLauncher>)browserLauncher
   }
 
   // Use the mainBVC as the ContentSuggestions can only be started in non-OTR.
-  ios::ChromeBrowserState* mainBrowserState =
+  ChromeBrowserState* mainBrowserState =
       _browserLauncher.interfaceProvider.mainInterface.browserState;
   [ContentSuggestionsSchedulerNotifications notifyForeground:mainBrowserState];
 

ios/chrome/app/application_delegate/app_state_unittest.mm

@@ -320,7 +320,7 @@ class AppStateTest : public BlockCleanupTest {
   StubBrowserInterfaceProvider* getInterfaceProvider() {
     return interface_provider_;
   }
-  ios::ChromeBrowserState* getBrowserState() { return browser_state_.get(); }
+  ChromeBrowserState* getBrowserState() { return browser_state_.get(); }
 
   BOOL metricsMediatorHasBeenCalled() { return metrics_mediator_called_; }