[iOS Clean] Added JavaScript 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/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/java_script_dialogs/web_java_script_dialog_presenter.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"
 #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 93 matching lines @@
 
 - (void)openContextMenuImage:(ContextMenuContext*)context {
   ContextMenuContextImpl* contextImpl =
       base::mac::ObjCCastStrict<ContextMenuContextImpl>(context);
   web::NavigationManager::WebLoadParams loadParams(contextImpl.imageURL);
   self.webState->GetNavigationManager()->LoadURLWithParams(loadParams);
 }
 
 #pragma mark - CRWWebStateDelegate
 
+- (web::JavaScriptDialogPresenter*)javaScriptDialogPresenterForWebState:
+    (web::WebState*)webState {
+  [self createDialogHelpers];
+  return WebJavaScriptDialogPresenter::FromWebState(webState);
+}
+
 - (BOOL)webState:(web::WebState*)webState
     handleContextMenu:(const web::ContextMenuParams&)params {
   ContextMenuContextImpl* context =
       [[ContextMenuContextImpl alloc] initWithParams:params];
   WebContextMenuCoordinator* contextMenu =
       [[WebContextMenuCoordinator alloc] initWithContext:context];
   [self addChildCoordinator:contextMenu];
   [contextMenu start];
   return YES;
 }
 
 #pragma mark - OverlayPresentationCommands
 
 - (void)startNextOverlayForWebState:(web::WebState*)webState {
   DCHECK_EQ(self.webState, webState);
   [self startNextOverlay];
 }
 
 #pragma mark -
 
 - (void)createDialogHelpers {
   id<OverlaySchedulerCommands> overlayDispatcher =
       static_cast<id<OverlaySchedulerCommands>>(self.browser->dispatcher());
   OverlayQueue::CreateForWebState(self.webState, overlayDispatcher);
+  WebJavaScriptDialogPresenter::CreateForWebState(self.webState);

[marq (ping after 24h), 2017/06/14 11:28:39]

This implies the presenter will be created when an HTTP dialog is created, which
seems incorrect.

[kkhorimoto, 2017/06/23 06:34:03]

This function doesn't exist anymore since the OverlayQueue is automatically
instantiated by the OverlayService.  Instead, CreateForWebState() is called
directly in |-javaScriptDialogPresenterForWebState:|

 }
 
 - (void)startNextOverlay {
   OverlayQueue* queue = OverlayQueue::FromWebState(self.webState);
   if (queue->HasQueuedOverlays() && !queue->IsShowingOverlay())
     queue->StartNextOverlay(self);
 }
 
 @end