Integrate SMS service with Desktop iOS promotion

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index b667f6f51c6554448b779e1d8d9f78388275db6e..24f7293eb743eff09b6514019bd6c3c5cb8c0312 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -2395,6 +2395,22 @@ const char kIOSPromotionEligible[] = "ios.desktoptomobileeligible";
 // SMS.
 const char kIOSPromotionDone[] = "ios.desktop_ios_promo_done";
 
+// Index of the entry point that last initiated sending the SMS to the user for
+// the "desktop to iOS" promotion (see DesktopIOSPromotion.IOSSigninReason
+// histogram for details).
+const char kIOSPromotionSMSEntryPoint[] =
+    "ios.desktop_ios_promo_sms_entrypoint";
+
+// Indexes of all the entry points presented to the user for "desktop to iOS"
+// promotion
+const char kIOSPromotionShownEntryPoints[] =
+    "ios.desktop_ios_promo_shown_entrypoints";
+
+// Timestamp of the last "desktop to iOS" promotion last impression,
+// This is the same time of SMS sending if the user optin to send SMS.
+const char kIOSPromotionLastImpression[] =
+    "ios.desktop_ios_promo_last_impression";
+
 // Number of times user has seen the "desktop to iOS" save passwords bubble
 // promotion.
 const char kNumberSavePasswordsBubbleIOSPromoShown[] =