[iOS Clean] Added JavaScript dialog support.

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

Index: ios/clean/chrome/browser/ui/dialogs/java_script_dialogs/java_script_dialog_mediator.h
diff --git a/ios/clean/chrome/browser/ui/dialogs/java_script_dialogs/java_script_dialog_mediator.h b/ios/clean/chrome/browser/ui/dialogs/java_script_dialogs/java_script_dialog_mediator.h
new file mode 100644
index 0000000000000000000000000000000000000000..91ad33b3bcfe0fcfe30028d5cfc777e12f8bd693
--- /dev/null
+++ b/ios/clean/chrome/browser/ui/dialogs/java_script_dialogs/java_script_dialog_mediator.h
@@ -0,0 +1,29 @@
+// 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_MEDIATOR_H_
+#define IOS_CLEAN_CHROME_BROWSER_UI_DIALOGS_JAVA_SCRIPT_JAVA_SCRIPT_DIALOG_MEDIATOR_H_
+
+#import <Foundation/Foundation.h>
+
+#import "ios/clean/chrome/browser/ui/dialogs/dialog_mediator.h"
+
+@protocol JavaScriptDialogDismissalCommands;
+@class JavaScriptDialogRequest;
+
+// Class responsible for setting up a JavaScriptDialogConsumer.
+@interface JavaScriptDialogMediator : DialogMediator
+
+// Designated initializer for a mediator that uses |request| to configure
+// consumers and |dispatcher| for dismissal.  Both arguments are expected to be
+// non-nil.
+- (instancetype)initWithRequest:(JavaScriptDialogRequest*)request
+                     dispatcher:
+                         (id<JavaScriptDialogDismissalCommands>)dispatcher
+    NS_DESIGNATED_INITIALIZER;
+- (instancetype)init NS_UNAVAILABLE;
+
+@end
+
+#endif  // IOS_CLEAN_CHROME_BROWSER_UI_DIALOGS_JAVA_SCRIPT_JAVA_SCRIPT_DIALOG_MEDIATOR_H_