Add JavaScript prompts support to CWVUIDelegate.

ios/web_view/internal/cwv_web_view.mm

 // Copyright 2014 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/web_view/public/cwv_web_view.h"
 
 #include <memory>
 #include <utility>
 
 #import "base/ios/weak_nsobject.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/sys_string_conversions.h"
 #import "ios/web/public/navigation_manager.h"
 #include "ios/web/public/referrer.h"
 #import "ios/web/public/web_state/context_menu_params.h"
 #import "ios/web/public/web_state/js/crw_js_injection_receiver.h"
 #import "ios/web/public/web_state/ui/crw_web_delegate.h"
 #import "ios/web/public/web_state/web_state.h"
 #import "ios/web/public/web_state/web_state_delegate_bridge.h"
 #import "ios/web/public/web_state/web_state_observer_bridge.h"
 #import "ios/web_view/internal/cwv_html_element_internal.h"
 #import "ios/web_view/internal/cwv_website_data_store_internal.h"
 #import "ios/web_view/internal/translate/web_view_translate_client.h"
 #include "ios/web_view/internal/web_view_browser_state.h"
+#import "ios/web_view/internal/web_view_java_script_dialog_presenter.h"
 #import "ios/web_view/public/cwv_ui_delegate.h"
 #import "ios/web_view/public/cwv_web_view_configuration.h"
 #import "ios/web_view/public/cwv_web_view_delegate.h"
 #import "ios/web_view/public/cwv_website_data_store.h"
 #import "net/base/mac/url_conversions.h"
 #include "ui/base/page_transition_types.h"
 #include "url/gurl.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 @interface CWVWebView ()<CRWWebStateDelegate, CRWWebStateObserver> {
   CWVWebViewConfiguration* _configuration;
   std::unique_ptr<web::WebState> _webState;
   std::unique_ptr<web::WebStateDelegateBridge> _webStateDelegate;
   std::unique_ptr<web::WebStateObserverBridge> _webStateObserver;
   CGFloat _loadProgress;
+  // Handles presentation of JavaScript dialogs.
+  std::unique_ptr<ios_web_view::WebViewJavaScriptDialogPresenter>
+      _javaScriptDialogPresenter;
 }
 
 @end
 
 @implementation CWVWebView
 
 @synthesize delegate = _delegate;
 @synthesize loadProgress = _loadProgress;
 @synthesize UIDelegate = _UIDelegate;
 
 - (instancetype)initWithFrame:(CGRect)frame
                 configuration:(CWVWebViewConfiguration*)configuration {
   self = [super initWithFrame:frame];
   if (self) {
     _configuration = [configuration copy];
 
     web::WebState::CreateParams webStateCreateParams(
         [configuration.websiteDataStore browserState]);
     _webState = web::WebState::Create(webStateCreateParams);
     _webState->SetWebUsageEnabled(true);
 
     _webStateObserver =
         base::MakeUnique<web::WebStateObserverBridge>(_webState.get(), self);
     _webStateDelegate = base::MakeUnique<web::WebStateDelegateBridge>(self);
     _webState->SetDelegate(_webStateDelegate.get());
 
+    _javaScriptDialogPresenter =
+        base::MakeUnique<ios_web_view::WebViewJavaScriptDialogPresenter>(
+            self, _UIDelegate);
+
     // Initialize Translate.
     ios_web_view::WebViewTranslateClient::CreateForWebState(_webState.get());
   }
   return self;
 }
 
 - (void)willMoveToSuperview:(UIView*)newSuperview {
   [super willMoveToSuperview:newSuperview];
   UIView* subview = _webState->GetView();
   if (subview.superview == self) {
@@ skipping 69 matching lines @@
 
   // Set up the translate delegate.
   ios_web_view::WebViewTranslateClient* translateClient =
       ios_web_view::WebViewTranslateClient::FromWebState(_webState.get());
   id<CWVTranslateDelegate> translateDelegate = nil;
   if ([_delegate respondsToSelector:@selector(translateDelegate)])
     translateDelegate = [_delegate translateDelegate];
   translateClient->set_translate_delegate(translateDelegate);
 }
 
+- (void)setUIDelegate:(id<CWVUIDelegate>)UIDelegate {
+  _UIDelegate = UIDelegate;
+
+  _javaScriptDialogPresenter->SetUIDelegate(_UIDelegate);
+}
+
 - (void)notifyDidUpdateWithChanges:(CRIWVWebViewUpdateType)changes {
   SEL selector = @selector(webView:didUpdateWithChanges:);
   if ([_delegate respondsToSelector:selector]) {
     [_delegate webView:self didUpdateWithChanges:changes];
   }
 }
 
 // -----------------------------------------------------------------------
 // WebStateObserver implementation.
 
@@ skipping 35 matching lines @@
                                     mediaSource:mediaSource
                                            text:params.link_text];
   [_UIDelegate webView:self
       runContextMenuWithTitle:params.menu_title
                forHTMLElement:HTMLElement
                        inView:params.view
           userGestureLocation:params.location];
   return YES;
 }
 
+- (web::JavaScriptDialogPresenter*)javaScriptDialogPresenterForWebState:
+    (web::WebState*)webState {
+  return _javaScriptDialogPresenter.get();
+}
+
 @end