Upstream Chrome on iOS source code [10/11].

ios/chrome/browser/web/web_mediator.h

+// 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.
+
+// ======                        New Architecture                         =====
+// =         This code is only used in the new iOS Chrome architecture.       =
+// ============================================================================
+
+#ifndef IOS_CHROME_BROWSER_WEB_WEB_MEDIATOR_H_
+#define IOS_CHROME_BROWSER_WEB_WEB_MEDIATOR_H_
+
+#import <Foundation/Foundation.h>
+
+namespace web {
+class WebState;
+}
+
+// An object to provide extensible access to a webState.
+// Feature implementations that add functionality to a webState by injecting
+// javascript should do so in categories on WebMediator that implement protocols
+// for use by components interfacing with the feature and by webState clients
+// (for example, view controllers displaying webState's view).
+// Category implementations should make use of web_mediator+internals.h to
+// access internal APIs for this class.
+@interface WebMediator : NSObject
+
+- (instancetype)initWithWebState:(web::WebState*)webState
+    NS_DESIGNATED_INITIALIZER;
+
+- (instancetype)init NS_UNAVAILABLE;
+
+@property(nonatomic, readonly) web::WebState* webState;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_WEB_WEB_MEDIATOR_H_