[ios] Removed keyCode from FormActivityRegistered API.

ios/web/web_state/ui/crw_web_controller.mm

 // Copyright 2012 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/web_state/ui/crw_web_controller.h"
 
 #import <WebKit/WebKit.h>
 
 #import <objc/runtime.h>
 #include <stddef.h>
@@ skipping 2885 matching lines @@
       [context[web::kUserIsInteractingKey] boolValue]));
   return YES;
 }
 
 - (BOOL)handleFormActivityMessage:(base::DictionaryValue*)message
                           context:(NSDictionary*)context {
   std::string formName;
   std::string fieldName;
   std::string type;
   std::string value;
-  int keyCode = web::WebStateObserver::kInvalidFormKeyCode;
   bool inputMissing = false;
   if (!message->GetString("formName", &formName) ||
       !message->GetString("fieldName", &fieldName) ||
       !message->GetString("type", &type) ||
       !message->GetString("value", &value)) {
     inputMissing = true;
   }
 
-  double keyCodeAsDouble = 0;
-  if (!message->GetDouble("keyCode", &keyCodeAsDouble) || keyCodeAsDouble < 0) {
-    keyCode = web::WebStateObserver::kInvalidFormKeyCode;
-  } else {
-    keyCode = static_cast<int>(keyCodeAsDouble);
-  }
   _webStateImpl->OnFormActivityRegistered(formName, fieldName, type, value,
-                                          keyCode, inputMissing);
+                                          inputMissing);
   return YES;
 }
 
 - (BOOL)handleCredentialsRequestedMessage:(base::DictionaryValue*)message
                                   context:(NSDictionary*)context {
   double request_id = -1;
   if (!message->GetDouble("requestId", &request_id)) {
     DLOG(WARNING) << "JS message parameter not found: requestId";
     return NO;
   }
@@ skipping 2848 matching lines @@
   }
 
   return web::WEB_VIEW_DOCUMENT_TYPE_GENERIC;
 }
 
 - (NSString*)refererFromNavigationAction:(WKNavigationAction*)action {
   return [action.request valueForHTTPHeaderField:@"Referer"];
 }
 
 @end