[signin] Enable signin interception for kMultiUser

Bug: 1076880
Change-Id: Icbdb6c50e53321acd30288e0f14c9f788a46cbe6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2352230Reviewed-by: Alex Ilin <alexilin@chromium.org>
Commit-Queue: David Roger <droger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#797621}

chrome/browser/ui/signin/dice_web_signin_interceptor_delegate.cc

@@ -17,9 +17,9 @@ void DiceWebSigninInterceptorDelegate::ShowSigninInterceptionBubble(
     content::WebContents* web_contents,
     const BubbleParameters& bubble_parameters,
     base::OnceCallback<void(bool)> callback) {
-  if (bubble_parameters.interception_type !=
-      DiceWebSigninInterceptor::SigninInterceptionType::kEnterprise) {
-    // Only the enterprise interception is currently implemented.
+  if (bubble_parameters.interception_type ==
+      DiceWebSigninInterceptor::SigninInterceptionType::kProfileSwitch) {
+    // The bubble for profile switch is not implemented.
     std::move(callback).Run(false);
     return;
   }