Add signin_metrics::AccessPoint to ShowSigninCommand.

ios/chrome/browser/ui/commands/show_signin_command.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_CHROME_BROWSER_UI_COMMANDS_SHOW_SIGNIN_COMMAND_H_
 #define IOS_CHROME_BROWSER_UI_COMMANDS_SHOW_SIGNIN_COMMAND_H_
 
 #import <Foundation/Foundation.h>
 
+#include "components/signin/core/browser/signin_metrics.h"
 #include "ios/chrome/browser/signin/constants.h"
 #include "ios/chrome/browser/ui/commands/generic_chrome_command.h"
 
 typedef void (^ShowSigninCommandCompletionCallback)(BOOL succeeded);
 
 enum AuthenticationOperation {
   // Operation to cancel the current authentication operation and dismiss any
   // UI presented by this operation.
   AUTHENTICATION_OPERATION_DISMISS,
 
@@ skipping 16 matching lines @@
 // SigninInteractionController and invoke a possibly-nil callback when finished.
 - (instancetype)initWithOperation:(AuthenticationOperation)operation
                      signInSource:(SignInSource)signInSource
                          callback:(ShowSigninCommandCompletionCallback)callback
     NS_DESIGNATED_INITIALIZER;
 
 // Initializes a ShowSigninCommand with a nil callback.
 - (instancetype)initWithOperation:(AuthenticationOperation)operation
                      signInSource:(SignInSource)signInSource;
 
+// Initializes a command to perform the specified operation with a
+// SigninInteractionController and invoke a possibly-nil callback when finished.
+- (instancetype)initWithOperation:(AuthenticationOperation)operation
+                signInAccessPoint:(signin_metrics::AccessPoint)signInAccessPoint
+                         callback:(ShowSigninCommandCompletionCallback)callback;
+
+// Initializes a ShowSigninCommand with a nil callback.
+- (instancetype)initWithOperation:(AuthenticationOperation)operation
+                signInAccessPoint:
+                    (signin_metrics::AccessPoint)signInAccessPoint;
+
 // The callback to be invoked after the operation is complete.
 @property(nonatomic, readonly) ShowSigninCommandCompletionCallback callback;
 
 // The operation to perform during the sign-in flow.
 @property(nonatomic, readonly) AuthenticationOperation operation;
 
 // The source of this authentication operation.
 @property(nonatomic, readonly) SignInSource signInSource;
 
+// The access point of this authentication operation.
+@property(nonatomic, readonly) signin_metrics::AccessPoint signInAccessPoint;
+
 @end
 
 #endif  // IOS_CHROME_BROWSER_UI_COMMANDS_SHOW_SIGNIN_COMMAND_H_