[iOS][Credential-Provider] Require auth to init password list.

Bug: 1045454
Change-Id: I44d39828843e817e82f20afe4abc1558b92a1e41
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2134252
Commit-Queue: Javier Ernesto Flores Robles <javierrobles@chromium.org>
Commit-Queue: David Jean <djean@chromium.org>
Auto-Submit: Javier Ernesto Flores Robles <javierrobles@chromium.org>
Reviewed-by: David Jean <djean@chromium.org>
Cr-Commit-Position: refs/heads/master@{#756198}

ios/chrome/credential_provider_extension/credential_provider_view_controller.mm

@@ -33,26 +33,23 @@
 
 - (void)prepareCredentialListForServiceIdentifiers:
     (NSArray<ASCredentialServiceIdentifier*>*)serviceIdentifiers {
-  self.listCoordinator = [[CredentialListCoordinator alloc]
-      initWithBaseViewController:self
-                         context:self.extensionContext
-              serviceIdentifiers:serviceIdentifiers];
-  [self.listCoordinator start];
-}
-
-- (void)viewDidAppear:(BOOL)animated {
-  [super viewDidAppear:animated];
-
-  // TODO(crbug.com/1045455): Remove, this is for testing purpose only.
   [self reauthenticateIfNeededWithCompletionHandler:^(
             ReauthenticationResult result) {
-    // TODO(crbug.com/1045455): Check result before cancelling.
-    [self.extensionContext
-        cancelRequestWithError:
-            [[NSError alloc]
-                initWithDomain:ASExtensionErrorDomain
-                          code:ASExtensionErrorCode::ASExtensionErrorCodeFailed
-                      userInfo:nil]];
+    if (result != ReauthenticationResult::kFailure) {
+      self.listCoordinator = [[CredentialListCoordinator alloc]
+          initWithBaseViewController:self
+                             context:self.extensionContext
+                  serviceIdentifiers:serviceIdentifiers];
+      [self.listCoordinator start];
+
+    } else {
+      [self.extensionContext
+          cancelRequestWithError:
+              [[NSError alloc] initWithDomain:ASExtensionErrorDomain
+                                         code:ASExtensionErrorCode::
+                                                  ASExtensionErrorCodeFailed
+                                     userInfo:nil]];
+    }
   }];
 }