Remove several preferences from incognito whitelist (11).

The following preferences are removed from the persistent storage list
for incognito mode:
 - kBackgroundTracingLastUpload
 - kDefaultAudioCaptureDevice
 - kDefaultTasksByMimeType
 - kDefaultTasksBySuffix
 - kDefaultVideoCaptureDevice
 - kMediaGalleriesRememberedGalleries
 - kMediaGalleriesUniqueId
 - kPartnerBookmarkMappings
 - kPepperFlashSettingsEnabled
 - kPerformanceTracingEnabled
 - kWebRTCIPHandlingPolicy
 - kWebRTCMultipleRoutesEnabled
 - kWebRTCNonProxiedUdpEnabled

These preferences are either never changed from incognito mode, or if
changed, they do not need to be written to user profile.

Bug: 861722
Change-Id: I03fb38784b57460b4d2e74c1abfdb01e83ddbda2
TBR: guidou@chromium.org
TBR: oysteine@chromium.org
TBR: satorux@chromium.org
TBR: tommycli@chromium.org
TBR: wychen@chromium.org
TBR: zork@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/1250521
Commit-Queue: Ramin Halavati <rhalavati@chromium.org>
Reviewed-by: Ramin Halavati <rhalavati@chromium.org>
Cr-Commit-Position: refs/heads/master@{#595018}

chrome/browser/prefs/pref_service_incognito_whitelist.cc

@@ -206,37 +206,8 @@ const char* const kPersistentPrefNames[] = {
 // audited, checked with owners, and removed or transfered to
 // |kPersistentPrefNames|.
 const char* const kTemporaryIncognitoWhitelist[] = {
-    // chrome/common/pref_names.h
-    prefs::kWebRTCMultipleRoutesEnabled,
-    prefs::kWebRTCNonProxiedUdpEnabled,
-    prefs::kWebRTCIPHandlingPolicy,
-
-    prefs::kDefaultTasksByMimeType,
-    prefs::kDefaultTasksBySuffix,
-
-    prefs::kDefaultAudioCaptureDevice,
-    prefs::kDefaultVideoCaptureDevice,
     prefs::kMediaDeviceIdSalt,
-
     prefs::kClearPluginLSODataEnabled,
-    prefs::kPepperFlashSettingsEnabled,
-
-    prefs::kPerformanceTracingEnabled,
-
-#if !defined(OS_ANDROID)
-    prefs::kMediaGalleriesUniqueId,
-    prefs::kMediaGalleriesRememberedGalleries,
-#endif  // !defined(OS_ANDROID)
-
-#if defined(OS_ANDROID)
-    prefs::kPartnerBookmarkMappings,
-#endif  // defined(OS_ANDROID)
-
-#if BUILDFLAG(ENABLE_BACKGROUND_MODE)
-// prefs::kRestartInBackground,
-#endif
-
-    prefs::kBackgroundTracingLastUpload,
 };
 
 }  // namespace