Revert of [Autofill] Enable Autofill UKM by default.

components/autofill/core/browser/autofill_experiments.h

 // Copyright 2015 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_AUTOFILL_CORE_BROWSER_AUTOFILL_EXPERIMENTS_H_
 #define COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOFILL_EXPERIMENTS_H_
 
 #include <string>
 
 #include "base/strings/string16.h"
@@ skipping 11 matching lines @@
 }
 
 namespace autofill {
 
 struct Suggestion;
 
 extern const base::Feature kAutofillCreditCardAssist;
 extern const base::Feature kAutofillScanCardholderName;
 extern const base::Feature kAutofillCreditCardPopupLayout;
 extern const base::Feature kAutofillCreditCardLastUsedDateDisplay;
+extern const base::Feature kAutofillUkmLogging;
 extern const base::Feature kAutofillUpstreamRequestCvcIfMissing;
 extern const base::Feature kAutofillUpstreamUseAutofillProfileComparatorForName;
 extern const base::Feature kAutofillUpstreamUseNotRecentlyUsedAutofillProfile;
 extern const char kCreditCardSigninPromoImpressionLimitParamKey[];
 extern const char kAutofillCreditCardLastUsedDateShowExpirationDateKey[];
 extern const char kAutofillUpstreamMaxMinutesSinceAutofillProfileUseKey[];
 
 // Returns true if autofill should be enabled. See also
 // IsInAutofillSuggestionsDisabledExperiment below.
 bool IsAutofillEnabled(const PrefService* pref_service);
@@ skipping 55 matching lines @@
 
 // Modifies the suggestion value and label if the new credit card autofill popup
 // experiment is enabled to tweak the display of the value and label.
 void ModifyAutofillCreditCardSuggestion(struct Suggestion* suggestion);
 
 // Returns the margin for the icon, label and between icon and label. Returns 0
 // if the margin isn't configured in an experiment to tweak autofill popup
 // layout.
 unsigned int GetPopupMargin();
 
+// Returns whether the feature to log UKMs is enabled.
+bool IsUkmLoggingEnabled();
+
 // Returns whether the experiment is enabled where Chrome Upstream requests CVC
 // in the offer to save bubble if it was not detected during the checkout flow.
 bool IsAutofillUpstreamRequestCvcIfMissingExperimentEnabled();
 
 // Returns the maximum time that could have elapsed since an address profile's
 // most recent use for the adress profile to be included in the candidate set
 // for card upload. Returns 0 if the experiment is not enabled.
 base::TimeDelta GetMaxTimeSinceAutofillProfileUseForCardUpload();
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOFILL_EXPERIMENTS_H_