Remove unused flags from chrome_switches.h.

R=thestig@chromium.org
BUG=none

Review URL: https://codereview.chromium.org/801983002

Cr-Commit-Position: refs/heads/master@{#308212}

chrome/common/chrome_switches.cc

@@ -398,7 +398,7 @@ const char kDnsPrefetchDisable[]            = "dns-prefetch-disable";
 const char kDumpBrowserHistograms[]         = "dump-browser-histograms";
 
 // Overrides the path of Easy Unlock component app.
-extern const char kEasyUnlockAppPath[]      = "easy-unlock-app-path";
+const char kEasyUnlockAppPath[]             = "easy-unlock-app-path";
 
 // If set, the app list will be enabled as if enabled from CWS.
 const char kEnableAppList[]                 = "enable-app-list";

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[];