Add signin_metrics::AccessPoint to ShowSigninCommand.

ios/chrome/browser/ui/commands/show_signin_command.mm

Index: ios/chrome/browser/ui/commands/show_signin_command.mm
diff --git a/ios/chrome/browser/ui/commands/show_signin_command.mm b/ios/chrome/browser/ui/commands/show_signin_command.mm
index add4797dfea8bde68e6e1e4389cbe687f10d3adc..ca152fe368ef849ef93a563bbb0bca4b405d9e95 100644
--- a/ios/chrome/browser/ui/commands/show_signin_command.mm
+++ b/ios/chrome/browser/ui/commands/show_signin_command.mm
@@ -14,6 +14,7 @@
 
 @synthesize operation = _operation;
 @synthesize signInSource = _signInSource;
+@synthesize signInAccessPoint = _signInAccessPoint;
 
 - (instancetype)initWithTag:(NSInteger)tag {
   NOTREACHED();
@@ -38,6 +39,26 @@
       [self initWithOperation:operation signInSource:signInSource callback:nil];
 }
 
+- (instancetype)initWithOperation:(AuthenticationOperation)operation
+                signInAccessPoint:(signin_metrics::AccessPoint)signInAccessPoint
+                         callback:
+                             (ShowSigninCommandCompletionCallback)callback {
+  if ((self = [self initWithOperation:operation
+                         signInSource:SIGN_IN_SOURCE_OTHER
+                             callback:callback])) {
+    _signInAccessPoint = signInAccessPoint;
+  }
+  return self;
+}
+
+- (instancetype)initWithOperation:(AuthenticationOperation)operation
+                signInAccessPoint:
+                    (signin_metrics::AccessPoint)signInAccessPoint {
+  return [self initWithOperation:operation
+               signInAccessPoint:signInAccessPoint
+                        callback:nil];
+}
+
 - (ShowSigninCommandCompletionCallback)callback {
   return _callback.get();
 }