Componentize enhanced_bookmark_features.{h,cc}.

chrome/common/chrome_switches.h

Index: chrome/common/chrome_switches.h
diff --git a/chrome/common/chrome_switches.h b/chrome/common/chrome_switches.h
index 8c22f61e4a6813206a9535baf27f522bb39edf2e..65b1e44401be2dd076b10d6cdf322b340e05eaed 100644
--- a/chrome/common/chrome_switches.h
+++ b/chrome/common/chrome_switches.h
@@ -120,9 +120,7 @@ extern const char kEnableClearBrowsingDataCounters[];
 extern const char kEnableCloudPrintProxy[];
 extern const char kEnableDevToolsExperiments[];
 extern const char kEnableDeviceDiscoveryNotifications[];
-extern const char kEnableDomDistiller[];
 extern const char kEnableDownloadNotification[];
-extern const char kEnhancedBookmarksExperiment[];
 extern const char kEnableDomainReliability[];
 extern const char kEnableEphemeralAppsInWebstore[];
 extern const char kEnableExperimentalHotwordHardware[];
@@ -158,13 +156,11 @@ extern const char kDisableSettingsWindow[];
 extern const char kEnableSiteEngagementService[];
 extern const char kEnableSuggestionsService[];
 extern const char kEnableSupervisedUserManagedBookmarksFolder[];
-extern const char kEnableSyncArticles[];
 extern const char kEnableTabAudioMuting[];
 extern const char kEnableThumbnailRetargeting[];
 extern const char kEnableUserAlternateProtocolPorts[];
 extern const char kEnableWebAppFrame[];
 extern const char kEnableWifiCredentialSync[];
-extern const char kEnhancedBookmarksExperiment[];
 extern const char kExtensionContentVerificationBootstrap[];
 extern const char kExtensionContentVerificationEnforceStrict[];
 extern const char kExtensionContentVerificationEnforce[];