Update AutofillClientIOS for Autofill changes.

ios/chrome/browser/ui/autofill/autofill_client_ios.h

 // 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.
 
 #ifndef IOS_CHROME_BROWSER_UI_AUTOFILL_AUTOFILL_CLIENT_IOS_H_
 #define IOS_CHROME_BROWSER_UI_AUTOFILL_AUTOFILL_CLIENT_IOS_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 70 matching lines @@
       const std::vector<base::string16>& values,
       const std::vector<base::string16>& labels) override;
   void PropagateAutofillPredictions(
       content::RenderFrameHost* rfh,
       const std::vector<FormStructure*>& forms) override;
   void DidFillOrPreviewField(const base::string16& autofilled_value,
                              const base::string16& profile_full_name) override;
   void OnFirstUserGestureObserved() override;
   scoped_refptr<AutofillWebDataService> GetDatabase() override;
   bool IsContextSecure(const GURL& form_origin) override;
+  bool ShouldShowSigninPromo() override;
+  void StartSigninFlow() override;
 
  private:
   ios::ChromeBrowserState* browser_state_;
   infobars::InfoBarManager* infobar_manager_;
   id<AutofillClientIOSBridge> bridge_;  // Weak
   password_manager::PasswordGenerationManager* password_generation_manager_;
   std::unique_ptr<IdentityProvider> identity_provider_;
   CardUnmaskPromptControllerImpl unmask_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(AutofillClientIOS);
 };
 
 }  // namespace autofill
 
 #endif  // IOS_CHROME_BROWSER_UI_AUTOFILL_AUTOFILL_CLIENT_IOS_H_