Refactor the various ways to control what users can do to extensions.

chrome/common/extensions/extension_manifest_constants.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/common/extensions/extension_manifest_constants.h"
 
 namespace extension_manifest_keys {
 
 const char kAllFrames[] = "all_frames";
 const char kAltKey[] = "altKey";
@@ skipping 150 matching lines @@
     "Cannot access contents of url \"*\". "
     "Extension manifest must request permission to access this host.";
 const char kCannotChangeExtensionID[] =
     "Installed extensions cannot change their IDs.";
 const char kCannotClaimAllHostsInExtent[] =
     "Cannot claim all hosts ('*') in an extent.";
 const char kCannotClaimAllURLsInExtent[] =
     "Cannot claim all URLs in an extent.";
 const char kCannotScriptGallery[] =
     "The extensions gallery cannot be scripted.";
-const char kCannotUninstallManagedExtension[] =
-    "Attempted uninstallation of an extension that is not user-manageable.";
 const char kChromeVersionTooLow[] =
     "This extension requires * version * or greater.";
 const char kDisabledByPolicy[] =
     "This extension has been disabled by your administrator.";
 const char kExpectString[] = "Expect string value.";
 const char kExperimentalFlagRequired[] =
     "Loading extensions with 'experimental' permission is turned off by "
     "default. You can enable 'Experimental Extension APIs' "
     "by visiting chrome://flags.";
 const char kInvalidAllFrames[] =
@@ skipping 290 matching lines @@
     "Platform apps need manifest_version set to >= 2";
 const char kReservedMessageFound[] =
     "Reserved key * found in message catalog.";
 const char kWebRequestConflictsWithLazyBackground[] =
     "The 'webRequest' API cannot be used with event pages.";
 #if defined(OS_CHROMEOS)
 const char kIllegalPlugins[] =
     "Extensions cannot install plugins on Chrome OS";
 #endif
 }  // namespace extension_manifest_errors