Change id to instancetype in FormSuggestion

components/autofill/ios/browser/form_suggestion.mm

 // Copyright 2013 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 "components/autofill/ios/browser/form_suggestion.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 @interface FormSuggestion ()
 // Local initializer for a FormSuggestion.
-- (id)initWithValue:(NSString*)value
-    displayDescription:(NSString*)displayDescription
-                  icon:(NSString*)icon
-            identifier:(NSInteger)identifier;
+- (instancetype)initWithValue:(NSString*)value
+           displayDescription:(NSString*)displayDescription
+                         icon:(NSString*)icon
+                   identifier:(NSInteger)identifier;
 @end
 
 @implementation FormSuggestion
 
 @synthesize value = _value;
 @synthesize displayDescription = _displayDescription;
 @synthesize icon = _icon;
 @synthesize identifier = _identifier;
 
-- (id)initWithValue:(NSString*)value
-    displayDescription:(NSString*)displayDescription
-                  icon:(NSString*)icon
-            identifier:(NSInteger)identifier {
+- (instancetype)initWithValue:(NSString*)value
+           displayDescription:(NSString*)displayDescription
+                         icon:(NSString*)icon
+                   identifier:(NSInteger)identifier {
   self = [super init];
   if (self) {
     _value = [value copy];
     _displayDescription = [displayDescription copy];
     _icon = [icon copy];
     _identifier = identifier;
   }
   return self;
 }
 
 + (FormSuggestion*)suggestionWithValue:(NSString*)value
                     displayDescription:(NSString*)displayDescription
                                   icon:(NSString*)icon
                             identifier:(NSInteger)identifier {
   return [[FormSuggestion alloc] initWithValue:value
                             displayDescription:displayDescription
                                           icon:icon
                                     identifier:identifier];
 }
 
 @end