Remove Windows promotion preferences from incognito whitelist.

Windows promotion preferences are removed from the persistent storage
list for incognito mode.
After this CL, if these preferences are changed from incognito mode,
they are only stored in memory and won't affect user profile.

Bug: 861722
Change-Id: I2c806b403ecbcf25ce0aab7984e6c313dbc81912
Reviewed-on: https://chromium-review.googlesource.com/1179146Reviewed-by: Justin Cohen <justincohen@chromium.org>
Commit-Queue: Ramin Halavati <rhalavati@chromium.org>
Cr-Commit-Position: refs/heads/master@{#584367}

chrome/browser/prefs/pref_service_incognito_whitelist.cc

@@ -637,18 +637,6 @@ const char* const kTemporaryIncognitoWhitelist[] = {
     prefs::kWebShareVisitedTargets,
 
 #if defined(OS_WIN)
-    prefs::kIOSPromotionEligible, prefs::kIOSPromotionDone,
-    prefs::kIOSPromotionSMSEntryPoint, prefs::kIOSPromotionShownEntryPoints,
-    prefs::kIOSPromotionLastImpression, prefs::kIOSPromotionVariationId,
-    prefs::kNumberSavePasswordsBubbleIOSPromoShown,
-    prefs::kSavePasswordsBubbleIOSPromoDismissed,
-    prefs::kNumberBookmarksBubbleIOSPromoShown,
-    prefs::kBookmarksBubbleIOSPromoDismissed,
-    prefs::kNumberBookmarksFootNoteIOSPromoShown,
-    prefs::kBookmarksFootNoteIOSPromoDismissed,
-    prefs::kNumberHistoryPageIOSPromoShown,
-    prefs::kHistoryPageIOSPromoDismissed,
-
 #if defined(GOOGLE_CHROME_BUILD)
     prefs::kIncompatibleApplications, prefs::kModuleBlacklistCacheMD5Digest,
     prefs::kProblematicPrograms, prefs::kThirdPartyBlockingEnabled,