Remove unused flags from chrome_switches.h.

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 e256704e762d9527324b9e86ceaf01eac7c2c78b..81d5070a6b9c9390933440b2aa3653cdc2c91700 100644
--- a/chrome/common/chrome_switches.h
+++ b/chrome/common/chrome_switches.h
@@ -76,7 +76,6 @@ extern const char kDisableComponentExtensionsWithBackgroundPages[];
 extern const char kDisableComponentUpdate[];
 extern const char kDisableDefaultApps[];
 extern const char kDisableDeviceDiscoveryNotifications[];
-extern const char kDisableDnsProbes[];
 extern const char kDisableDomainReliability[];
 extern const char kDisableExtensionsFileAccessCheck[];
 extern const char kDisableExtensionsHttpThrottling[];
@@ -130,7 +129,6 @@ extern const char kEnableDeviceDiscoveryNotifications[];
 extern const char kEnableDomDistiller[];
 extern const char kEnhancedBookmarksExperiment[];
 extern const char kEnableDomainReliability[];
-extern const char kEnableEnhancedBookmarks[];
 extern const char kEnableEphemeralAppsInWebstore[];
 extern const char kDisableExperimentalHotwording[];
 extern const char kEnableExperimentalHotwordHardware[];
@@ -161,7 +159,6 @@ extern const char kEnableQuic[];
 extern const char kEnableQuicPacing[];
 extern const char kEnableQuicPortSelection[];
 extern const char kEnableReaderModeToolbarIcon[];
-extern const char kEnableResourceContentSettings[];
 extern const char kEnableSavePasswordBubble[];
 extern const char kEnableSdchOverHttps[];
 extern const char kEnableSearchButtonInOmniboxAlways[];
@@ -204,7 +201,6 @@ extern const char kHelp[];
 extern const char kHelpShort[];
 extern const char kHideIcons[];
 extern const char kHistoryEnableGroupByDomain[];
-extern const char kHistoryWebHistoryUrl[];
 extern const char kHomePage[];
 extern const char kHostRules[];
 extern const char kHostResolverParallelism[];
@@ -240,7 +236,6 @@ extern const char kNoPings[];
 extern const char kNoServiceAutorun[];
 extern const char kNoStartupWindow[];
 extern const char kNoSupervisedUserAcknowledgmentCheck[];
-extern const char kNtpAppInstallHint[];
 extern const char kNumPacThreads[];
 extern const char kOpenInNewWindow[];
 extern const char kOriginToForceQuicOn[];
@@ -262,7 +257,6 @@ extern const char kPrerenderMode[];
 extern const char kPrerenderModeSwitchValueAuto[];
 extern const char kPrerenderModeSwitchValueDisabled[];
 extern const char kPrerenderModeSwitchValueEnabled[];
-extern const char kPrerenderModeSwitchValuePrefetchOnly[];
 extern const char kPrivetIPv6Only[];
 extern const char kProductVersion[];
 extern const char kProfileDirectory[];
@@ -327,7 +321,6 @@ extern const char kSyncDeferredStartupTimeoutSeconds[];
 extern const char kSyncEnableGetUpdateAvoidance[];
 extern const char kSyncDisableBackup[];
 extern const char kSyncDisableRollback[];
-extern const char kTabCapture[];
 extern const char kTestName[];
 extern const char kTrustedSpdyProxy[];
 extern const char kTryChromeAgain[];