[Android][WebSignin] Add metric SuppressedSigninNotAllowed for account picker

This CL adds a metric SuppressedSigninNotAllowed to
Signin.AccountConsistencyPromoAction when web sign-in bottom sheet is
not shown due to sign-in not allowed.

Change-Id: Ic2f3334a28c1a46da955ed4bd1069f3d76651e00
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2450090Reviewed-by: Boris Sazonov <bsazonov@chromium.org>
Commit-Queue: Alice Wang <aliceywang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#814583}

chrome/android/java/src/org/chromium/chrome/browser/signin/SigninUtils.java

@@ -85,6 +85,8 @@ public class SigninUtils {
         SigninManager signinManager = IdentityServicesProvider.get().getSigninManager(
                 Profile.getLastUsedRegularProfile());
         if (!signinManager.isSignInAllowed()) {
+            AccountPickerDelegate.recordAccountConsistencyPromoAction(
+                    AccountConsistencyPromoAction.SUPPRESSED_SIGNIN_NOT_ALLOWED);
             return;
         }
         if (AccountManagerFacadeProvider.getInstance().tryGetGoogleAccounts().isEmpty()) {

chrome/android/java/src/org/chromium/chrome/browser/signin/account_picker/AccountConsistencyPromoAction.java

@@ -24,6 +24,7 @@ import java.lang.annotation.RetentionPolicy;
         AccountConsistencyPromoAction.SIGNED_IN_WITH_DEFAULT_ACCOUNT,
         AccountConsistencyPromoAction.SIGNED_IN_WITH_NON_DEFAULT_ACCOUNT,
         AccountConsistencyPromoAction.SHOWN,
+        AccountConsistencyPromoAction.SUPPRESSED_SIGNIN_NOT_ALLOWED,
 })
 @Retention(RetentionPolicy.SOURCE)
 public @interface AccountConsistencyPromoAction {
@@ -64,5 +65,11 @@ public @interface AccountConsistencyPromoAction {
      */
     int SHOWN = 6;
 
-    int MAX = 7;
+    /**
+     * Promo is not shown due to sign-in being disallowed either by an enterprise policy
+     * or by |Allow Chrome sign-in| toggle.
+     */
+    int SUPPRESSED_SIGNIN_NOT_ALLOWED = 7;
+
+    int MAX = 8;
 }

tools/metrics/histograms/enums.xml

@@ -965,9 +965,13 @@ Unknown properties are collapsed to zero. -->
     User has selected the default account and signed in with it.
   </int>
   <int value="5" label="SignedInWithNonDefaultAccount">
-    User has selected one of the non default accounta and signed in with it.
+    User has selected one of the non default account and signed in with it.
   </int>
   <int value="6" label="Shown">The promo was shown to user.</int>
+  <int value="7" label="SuppressedSigninNotAllowed">
+    Promo is not shown due to sign-in being disallowed either by an enterprise
+    policy or by |Allow Chrome sign-in| toggle.
+  </int>
 </enum>
 
 <enum name="AccountManagerAccountAdditionSource">