Decision whenever "Allow to collect URL?" bubble should be shown or not

components/password_manager/core/browser/password_manager_url_collection_experiment.h

Index: components/password_manager/core/browser/password_manager_url_collection_experiment.h
diff --git a/components/password_manager/core/browser/password_manager_url_collection_experiment.h b/components/password_manager/core/browser/password_manager_url_collection_experiment.h
index f5eb39aeec72a69cb24b15241164a398f6bb8adf..0d2b9d09af47b900822c8cddf365520f19e8f774 100644
--- a/components/password_manager/core/browser/password_manager_url_collection_experiment.h
+++ b/components/password_manager/core/browser/password_manager_url_collection_experiment.h
@@ -5,6 +5,8 @@
 #ifndef COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_PASSWORD_MANAGER_URL_COLLECTION_EXPERIMENT_H_
 #define COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_PASSWORD_MANAGER_URL_COLLECTION_EXPERIMENT_H_
 
+#include "base/time/time.h"
+
 namespace user_prefs {
 class PrefRegistrySyncable;
 }
@@ -18,11 +20,14 @@ namespace urls_collection_experiment {
 
 void RegisterPrefs(user_prefs::PrefRegistrySyncable* registry);
 
+// Implements an algorithm determining when the period starts, in which "Allow
+// to collect URL?" bubble can be shown.
+base::Time DetermineStartOfActivityPeriod(PrefService* prefs,
+                                          int experiment_length_in_days);
 // Based on |prefs| and experiment settings, decides whether to show the
 // "Allow to collect URL?" bubble and should be called before showing it.
 // The default value is false.
 bool ShouldShowBubble(PrefService* prefs);
-
 // Should be called when user dismisses the "Allow to collect URL?" bubble.
 // It stores the statistics about interactions with the bubble in |prefs|.
 void RecordBubbleClosed(PrefService* prefs);
@@ -30,6 +35,17 @@ void RecordBubbleClosed(PrefService* prefs);
 // The name of the finch experiment controlling the algorithm.
 extern const char kExperimentName[];
 
+// The name of the experiment parameter, value of which determines determines
+// how long the experiment is active.
+extern const char kParamExperimentLengthInDays[];
+
+// The bubble is shown only once and only within a certain period. The length of
+// the period is the value of the experiment parameter |kParamTimePeriodInDays|.
+extern const char kParamActivePeriodInDays[];
+/// The name of the experiment parameter, value of which defines whether
+// the bubble should appear or not.
+extern const char kParamBubbleStatus[];
+
 }  // namespace urls_collection_experiment
 }  // namespace password_manager