Move the `privacy` extension API out of experimental.

chrome/browser/extensions/extension_preference_api.cc

Index: chrome/browser/extensions/extension_preference_api.cc
diff --git a/chrome/browser/extensions/extension_preference_api.cc b/chrome/browser/extensions/extension_preference_api.cc
index 222572b1a86c1cdd3a935b8148939d597e60fd8e..e17813851e4a4cdf4a9283f1d764a12857c5fb20 100644
--- a/chrome/browser/extensions/extension_preference_api.cc
+++ b/chrome/browser/extensions/extension_preference_api.cc
@@ -55,28 +55,23 @@ const char kOnPrefChangeFormat[] = "types.ChromeSetting.%s.onChange";
 PrefMappingEntry kPrefMapping[] = {
   { "alternateErrorPagesEnabled",
     prefs::kAlternateErrorPagesEnabled,
-    ExtensionAPIPermission::kExperimental
+    ExtensionAPIPermission::kPrivacy
   },
   { "autofillEnabled",
     prefs::kAutofillEnabled,
-    ExtensionAPIPermission::kExperimental
+    ExtensionAPIPermission::kPrivacy
   },
   { "hyperlinkAuditingEnabled",
     prefs::kEnableHyperlinkAuditing,
-    ExtensionAPIPermission::kExperimental
+    ExtensionAPIPermission::kPrivacy
   },
   { "instantEnabled",
     prefs::kInstantEnabled,
-    ExtensionAPIPermission::kExperimental
+    ExtensionAPIPermission::kPrivacy
   },
-  // TODO(mkwst): come back to this once the UMA discussion has been resolved.
-  // { "metricsReportingEnabled",
-  //   prefs::kMetricsReportingEnabled,
-  //   ExtensionAPIPermission::kMetrics
-  // },
   { "networkPredictionEnabled",
     prefs::kNetworkPredictionEnabled,
-    ExtensionAPIPermission::kExperimental
+    ExtensionAPIPermission::kPrivacy
   },
   { "proxy",
     prefs::kProxy,
@@ -84,23 +79,23 @@ PrefMappingEntry kPrefMapping[] = {
   },
   { "referrersEnabled",
     prefs::kEnableReferrers,
-    ExtensionAPIPermission::kExperimental
+    ExtensionAPIPermission::kPrivacy
   },
   { "searchSuggestEnabled",
     prefs::kSearchSuggestEnabled,
-    ExtensionAPIPermission::kExperimental
+    ExtensionAPIPermission::kPrivacy
   },
   { "safeBrowsingEnabled",
     prefs::kSafeBrowsingEnabled,
-    ExtensionAPIPermission::kExperimental
+    ExtensionAPIPermission::kPrivacy
   },
   { "thirdPartyCookiesAllowed",
     prefs::kBlockThirdPartyCookies,
-    ExtensionAPIPermission::kExperimental
+    ExtensionAPIPermission::kPrivacy
   },
   { "translationServiceEnabled",
     prefs::kEnableTranslate,
-    ExtensionAPIPermission::kExperimental
+    ExtensionAPIPermission::kPrivacy
   }
 };