[Autofill] Uses uniform margin for icon, label and sublabel in popup

components/autofill/core/browser/autofill_experiments.h

Index: components/autofill/core/browser/autofill_experiments.h
diff --git a/components/autofill/core/browser/autofill_experiments.h b/components/autofill/core/browser/autofill_experiments.h
index db0868762b313450cfab568520ce440fdd49dd22..c218b742780e39202c1d9457b8d2403dd8c4eb2c 100644
--- a/components/autofill/core/browser/autofill_experiments.h
+++ b/components/autofill/core/browser/autofill_experiments.h
@@ -86,6 +86,11 @@ bool IsIconInCreditCardPopupAtStart();
 // 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();
+
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOFILL_EXPERIMENTS_H_