Remove Android specific preferences from incognito whitelist.

The following Android specific preferences are removed from the
persistent storage list for incognito mode.
 - kClickedUpdateMenuItem,
 - kContextualSearchEnabled,
 - kLatestVersionWhenClickedUpdateMenuItem,
 - kNotificationsVibrateEnabled
 - kPromptForDownloadAndroid
As these preferences are not written from inside an incognito window,
the CL is not expected to make any behavioral change and is just
cleanup.

Bug: 861722
Change-Id: Idb73eb2fc1e7c7c49faf0c92b17aad3b22c4fa9e
Reviewed-on: https://chromium-review.googlesource.com/1189922
Commit-Queue: Ramin Halavati <rhalavati@chromium.org>
Reviewed-by: Theresa <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#587018}

chrome/browser/prefs/pref_service_incognito_whitelist.cc

@@ -196,9 +196,6 @@ const char* const kTemporaryIncognitoWhitelist[] = {
 #endif
 
     prefs::kDataSaverEnabled, prefs::kSSLErrorOverrideAllowed,
-#if defined(OS_ANDROID)
-    prefs::kContextualSearchEnabled,
-#endif  // defined(OS_ANDROID)
 #if defined(OS_MACOSX) || defined(OS_WIN) || \
     (defined(OS_LINUX) && !defined(OS_CHROMEOS))
     prefs::kConfirmToQuitEnabled,
@@ -298,7 +295,6 @@ const char* const kTemporaryIncognitoWhitelist[] = {
     prefs::kLocalDiscoveryNotificationsEnabled,
 
 #if defined(OS_ANDROID)
-    prefs::kNotificationsVibrateEnabled,
     prefs::kMigratedToSiteNotificationChannels,
     prefs::kClearedBlockedSiteNotificationChannels,
 #endif
@@ -344,7 +340,7 @@ const char* const kTemporaryIncognitoWhitelist[] = {
     prefs::kOpenPdfDownloadInSystemReader,
 #endif
 #if defined(OS_ANDROID)
-    prefs::kPromptForDownloadAndroid, prefs::kShowMissingSdCardErrorAndroid,
+    prefs::kShowMissingSdCardErrorAndroid,
 #endif
 
     // prefs::kSaveFileDefaultDirectory, prefs::kSaveFileType,
@@ -515,11 +511,6 @@ const char* const kTemporaryIncognitoWhitelist[] = {
 
     prefs::kAllowDinosaurEasterEgg,
 
-#if defined(OS_ANDROID)
-    prefs::kClickedUpdateMenuItem,
-    prefs::kLatestVersionWhenClickedUpdateMenuItem,
-#endif
-
     prefs::kOriginTrialPublicKey, prefs::kOriginTrialDisabledFeatures,
     prefs::kOriginTrialDisabledTokens,