[iOS Clean] Added HTTP authentication dialog support.

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ios/clean/chrome/browser/ui/web_contents/web_coordinator.h"
 
 #include "base/mac/foundation_util.h"
 #include "base/memory/ptr_util.h"
 #import "ios/clean/chrome/browser/ui/commands/context_menu_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_request.h"
 #import "ios/clean/chrome/browser/ui/overlay_service/browser_coordinator+overlay_support.h"
 #import "ios/clean/chrome/browser/ui/overlay_service/overlay_service.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"
 #import "ios/shared/chrome/browser/ui/browser_list/browser.h"
 #import "ios/shared/chrome/browser/ui/commands/command_dispatcher.h"
 #import "ios/shared/chrome/browser/ui/coordinators/browser_coordinator+internal.h"
 #include "ios/web/public/navigation_manager.h"
 #include "ios/web/public/web_state/web_state.h"
 #import "ios/web/public/web_state/web_state_delegate_bridge.h"
@@ skipping 94 matching lines @@
     handleContextMenu:(const web::ContextMenuParams&)params {
   ContextMenuContextImpl* context =
       [[ContextMenuContextImpl alloc] initWithParams:params];
   WebContextMenuCoordinator* contextMenu =
       [[WebContextMenuCoordinator alloc] initWithContext:context];
   [self addChildCoordinator:contextMenu];
   [contextMenu start];
   return YES;
 }
 
+- (void)webState:(web::WebState*)webState
+    didRequestHTTPAuthForProtectionSpace:(NSURLProtectionSpace*)protectionSpace
+                      proposedCredential:(NSURLCredential*)proposedCredential
+                       completionHandler:(void (^)(NSString* username,
+                                                   NSString* password))handler {
+  HTTPAuthDialogRequest* request =
+      [HTTPAuthDialogRequest stateWithWebState:webState
+                               protectionSpace:protectionSpace
+                                    credential:proposedCredential
+                                      callback:handler];
+  HTTPAuthDialogCoordinator* dialogCoordinator =
+      [[HTTPAuthDialogCoordinator alloc] initWithRequest:request];
+  self.overlayService->ShowOverlayForWebState(dialogCoordinator, webState);
+}
+
 @end