[iOS Clean] Added HTTP authentication dialog support.

ios/clean/chrome/browser/ui/web_contents/web_coordinator.mm

Index: ios/clean/chrome/browser/ui/web_contents/web_coordinator.mm
diff --git a/ios/clean/chrome/browser/ui/web_contents/web_coordinator.mm b/ios/clean/chrome/browser/ui/web_contents/web_coordinator.mm
index 8275a7fc17c5f9c81fd04d7da1b78ac2ad5c5d68..0c10e3a550221e4f47eab3607ed74cc2cacc4a04 100644
--- a/ios/clean/chrome/browser/ui/web_contents/web_coordinator.mm
+++ b/ios/clean/chrome/browser/ui/web_contents/web_coordinator.mm
@@ -10,6 +10,8 @@
 #import "ios/clean/chrome/browser/ui/commands/overlay_commands.h"
 #import "ios/clean/chrome/browser/ui/context_menu/context_menu_context_impl.h"
 #import "ios/clean/chrome/browser/ui/context_menu/web_context_menu_coordinator.h"
+#import "ios/clean/chrome/browser/ui/dialogs/http_auth_dialogs/http_auth_dialog_coordinator.h"
+#import "ios/clean/chrome/browser/ui/dialogs/http_auth_dialogs/http_auth_dialog_state.h"
 #import "ios/clean/chrome/browser/ui/overlays/overlay_queue.h"
 #import "ios/clean/chrome/browser/ui/web_contents/web_contents_mediator.h"
 #import "ios/clean/chrome/browser/ui/web_contents/web_contents_view_controller.h"
@@ -134,6 +136,22 @@ - (BOOL)webState:(web::WebState*)webState
   return YES;
 }
 
+- (void)webState:(web::WebState*)webState
+    didRequestHTTPAuthForProtectionSpace:(NSURLProtectionSpace*)protectionSpace
+                      proposedCredential:(NSURLCredential*)proposedCredential
+                       completionHandler:(void (^)(NSString* username,
+                                                   NSString* password))handler {
+  HTTPAuthDialogState* state =
+      [HTTPAuthDialogState stateWithWebState:webState
+                             protectionSpace:protectionSpace
+                                  credential:proposedCredential
+                                    callback:handler];
+  HTTPAuthDialogCoordinator* coordinator =
+      [[HTTPAuthDialogCoordinator alloc] initWithState:state];
+  [self createDialogHelpers];
+  OverlayQueue::FromWebState(webState)->AddOverlay(coordinator);
+}
+
 #pragma mark - OverlayPresentationCommands
 
 - (void)startNextOverlayForWebState:(web::WebState*)webState {