Metrics for feature engagement tracker.

components/feature_engagement_tracker/internal/condition_validator.h

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_FEATURE_ENGAGEMENT_TRACKER_INTERNAL_CONDITION_VALIDATOR_H_
 #define COMPONENTS_FEATURE_ENGAGEMENT_TRACKER_INTERNAL_CONDITION_VALIDATOR_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 15 matching lines @@
 class ConditionValidator {
  public:
   // The Result struct is used to categorize everything that could have the
   // wrong state. By returning an instance of this where every value is true
   // from MeetsConditions(...), it can be assumed that in-product help will
   // be displayed.
   struct Result {
     explicit Result(bool initial_values);
     Result(const Result& other);
 
-    // Whether the Model was ready.
-    bool model_ready_ok;
+    // Whether the event model was ready.
+    bool event_model_ready_ok;
 
     // Whether no other in-product helps were shown at the time.
     bool currently_showing_ok;
 
     // Whether the feature is enabled.
     bool feature_enabled_ok;
 
     // Whether the feature configuration was valid.
     bool config_ok;
 
@@ skipping 10 matching lines @@
     bool session_rate_ok;
 
     // Whether the availability model was ready.
     bool availability_model_ready_ok;
 
     // Whether the availability precondition was met.
     bool availability_ok;
 
     // Returns true if this result object has no errors, i.e. no values that
     // are false.
-    bool NoErrors();
+    bool NoErrors() const;
   };
 
   virtual ~ConditionValidator() = default;
 
   // Returns a Result object that describes whether each condition has been met.
   virtual Result MeetsConditions(const base::Feature& feature,
                                  const FeatureConfig& config,
                                  const Model& model,
                                  const AvailabilityModel& availability_model,
                                  uint32_t current_day) const = 0;
 
   // Must be called to notify that the |feature| is currently showing.
   virtual void NotifyIsShowing(const base::Feature& feature) = 0;
 
   // Must be called to notify that the |feature| is no longer showing.
   virtual void NotifyDismissed(const base::Feature& feature) = 0;
 
  protected:
   ConditionValidator() = default;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ConditionValidator);
 };
 
 }  // namespace feature_engagement_tracker
 
 #endif  // COMPONENTS_FEATURE_ENGAGEMENT_TRACKER_INTERNAL_CONDITION_VALIDATOR_H_