[iOS Clean] Added JavaScript dialog support.

ios/clean/chrome/browser/ui/dialogs/java_script_dialogs/java_script_dialog_request.h

+// Copyright 2017 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.
+
+#ifndef IOS_CLEAN_CHROME_BROWSER_UI_DIALOGS_JAVA_SCRIPT_JAVA_SCRIPT_DIALOG_STATE_H_
+#define IOS_CLEAN_CHROME_BROWSER_UI_DIALOGS_JAVA_SCRIPT_JAVA_SCRIPT_DIALOG_STATE_H_
+
+#import <Foundation/Foundation.h>
+
+#import "ios/web/public/java_script_dialog_callback.h"
+#include "ios/web/public/java_script_dialog_type.h"
+
+class GURL;
+
+namespace web {
+class WebState;
+}
+
+// A container object encapsulating all the state necessary to support a
+// JavaScriptDialogCoordinator.  This object also owns the WebKit completion
+// block that will throw an exception if it is deallocated befor being executed.
+// |-runCallbackWithSuccess:userInput:| must be executed once in the lifetime of
+// every JavaScriptDialogRequest.
+@interface JavaScriptDialogRequest : NSObject
+
+// Factory method to create JavaScriptDialogRequests from the given input.
++ (instancetype)stateWithWebState:(web::WebState*)webState
+                             type:(web::JavaScriptDialogType)type
+                        originURL:(const GURL&)originURL
+                          message:(NSString*)message
+                defaultPromptText:(NSString*)defaultPromptText
+                         callback:(const web::DialogClosedCallback&)callback;
+
+// The WebState displaying this dialog.
+@property(nonatomic, readonly) web::WebState* webState;
+
+// The type of dialog to display.
+@property(nonatomic, readonly) web::JavaScriptDialogType type;
+
+// The title to use for the dialog.
+@property(nonatomic, readonly, strong) NSString* title;
+
+// The dialog message supplied by the page.
+@property(nonatomic, readonly, strong) NSString* message;
+
+// The default text to display in the text field for prompt dialogs.
+@property(nonatomic, readonly, strong) NSString* defaultPromptText;
+
+// Finishes the request with the proved parameters.  |success| indicates whether
+// the user tapped on the OK or Cancel button of the dialog.  For prompts,
+// |userInput| should be the input into the text field.  For cancelled prompts
+// or for alerts/confirmations, |userInput| should be nil.
+- (void)finishRequestWithSuccess:(BOOL)success userInput:(NSString*)userInput;
+
+@end
+
+#endif  // IOS_CLEAN_CHROME_BROWSER_UI_DIALOGS_JAVA_SCRIPT_JAVA_SCRIPT_DIALOG_STATE_H_