Fix typos in comments "reciever" -> "receiver".

ios/web/web_state/ui/crw_wk_script_message_router.h

 // 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.
 
 #ifndef IOS_WEB_WEB_STATE_UI_CRW_WK_SCRIPT_MESSAGE_ROUTER_H_
 #define IOS_WEB_WEB_STATE_UI_CRW_WK_SCRIPT_MESSAGE_ROUTER_H_
 
 #import <WebKit/WebKit.h>
 
 // WKUserContentController wrapper that allows adding multiple message handlers
 // for the same message name. CRWWKScriptMessageRouter will route the messages
-// from the underlying user content controller to a designated reciever by
+// from the underlying user content controller to a designated receiver by
 // matching the message's name and webView.
 @interface CRWWKScriptMessageRouter : NSObject
 
 // Underlying WKUserContentController.
 @property(nonatomic, readonly) WKUserContentController* userContentController;
 
 // Designated initializer. |userContentController| must not be nil.
 - (instancetype)initWithUserContentController:
     (WKUserContentController*)userContentController NS_DESIGNATED_INITIALIZER;
 
@@ skipping 11 matching lines @@
 // Removes a specific message handler.
 - (void)removeScriptMessageHandlerForName:(NSString*)messageName
                                   webView:(WKWebView*)webView;
 
 // Removes all message handlers for the given |webView|.
 - (void)removeAllScriptMessageHandlersForWebView:(WKWebView*)webView;
 
 @end
 
 #endif  // IOS_WEB_WEB_STATE_UI_CRW_WK_SCRIPT_MESSAGE_ROUTER_H_