Implement the UI logic behind the Sign In promo in the password bubble

components/password_manager/core/browser/password_bubble_experiment.cc

Index: components/password_manager/core/browser/password_bubble_experiment.cc
diff --git a/components/password_manager/core/browser/password_bubble_experiment.cc b/components/password_manager/core/browser/password_bubble_experiment.cc
index ab772cb4119a306d16e139972488537fa12ea14d..1001bf3b4e2d6fccc2408873a2cac246710cb6f9 100644
--- a/components/password_manager/core/browser/password_bubble_experiment.cc
+++ b/components/password_manager/core/browser/password_bubble_experiment.cc
@@ -18,6 +18,8 @@
 namespace password_bubble_experiment {
 
 const char kBrandingExperimentName[] = "PasswordBranding";
+const char kChromeSignInPasswordPromoExperimentName[] = "SignInPasswordPromo";
+const char kChromeSignInPasswordPromoThresholdParam[] = "dismissal_threshold";
 const char kSmartBubbleExperimentName[] = "PasswordSmartBubble";
 const char kSmartBubbleThresholdParam[] = "dismissal_count";
 const char kSmartLockBrandingGroupName[] = "SmartLockBranding";
@@ -31,6 +33,12 @@ void RegisterPrefs(PrefRegistrySimple* registry) {
   registry->RegisterBooleanPref(
       password_manager::prefs::kWasAutoSignInFirstRunExperienceShown, false,
       user_prefs::PrefRegistrySyncable::SYNCABLE_PRIORITY_PREF);
+
+  registry->RegisterBooleanPref(
+      password_manager::prefs::kWasSignInPasswordPromoClicked, false);
+
+  registry->RegisterIntegerPref(
+      password_manager::prefs::kNumberSignInPasswordPromoShown, 0);
 }
 
 int GetSmartBubbleDismissalThreshold() {
@@ -94,4 +102,18 @@ void TurnOffAutoSignin(PrefService* prefs) {
                     false);
 }
 
+bool ShouldShowChromeSignInPasswordPromo(PrefService* prefs) {
+  // Query the group first for correct UMA reporting.
+  std::string param = variations::GetVariationParamValue(
+      kChromeSignInPasswordPromoExperimentName,
+      kChromeSignInPasswordPromoThresholdParam);
+  int threshold = 0;
+  return base::StringToInt(param, &threshold) &&
+         !prefs->GetBoolean(
+             password_manager::prefs::kWasSignInPasswordPromoClicked) &&
+         prefs->GetInteger(
+             password_manager::prefs::kNumberSignInPasswordPromoShown) <
+             threshold;
+}
+
 }  // namespace password_bubble_experiment