Revert 137540 - Disable off-store extension installs by default. Also get rid of ExtensionService::…

chrome/common/extensions/extension_constants.h

 // 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.
 
 #ifndef CHROME_COMMON_EXTENSIONS_EXTENSION_CONSTANTS_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_CONSTANTS_H_
 #pragma once
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "googleurl/src/gurl.h"
 
 namespace extension_urls {
   // Returns the URL prefix for the extension/apps gallery. Can be set via the
   // --apps-gallery-url switch. The URL returned will not contain a trailing
-  // slash. Do not use this as a prefix/extent for the store.
+  // slash. Do not use this as a prefix/extent for the store.  Instead see
+  // ExtensionService::GetWebStoreApp or
+  // ExtensionService::IsDownloadFromGallery
   std::string GetWebstoreLaunchURL();
 
   // Returns the URL prefix for an item in the extension/app gallery. This URL
   // will contain a trailing slash and should be concatenated with an item ID
   // to get the item detail URL.
   std::string GetWebstoreItemDetailURLPrefix();
 
   // Returns the URL leading to a search page for Web Intents. The search is
   // specific to intents with the given |action| and |type|.
   GURL GetWebstoreIntentQueryURL(const std::string& action,
@@ skipping 222 matching lines @@
   extern const char kAppStateRunning[];
   extern const char kAppStateCannotRun[];
   extern const char kAppStateReadyToRun[];
 
   // Error indicating that the app notifications API is not accessible by split
   // mode extensions in incognito windows.
   extern const char kAppNotificationsIncognitoError[];
 }  // extension_misc
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_CONSTANTS_H_