Introduce background.scripts feature for extension manifests.

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"
 
 // Keys used in JSON representation of extensions.
 namespace extension_manifest_keys {
   extern const char kAllFrames[];
   extern const char kAltKey[];
   extern const char kApp[];
   extern const char kBackground[];
   extern const char kBackgroundPage[];
   extern const char kBackgroundPageLegacy[];
+  extern const char kBackgroundScripts[];
   extern const char kBrowserAction[];
   extern const char kBrowseURLs[];
   extern const char kChromeURLOverrides[];
   extern const char kContentScripts[];
   extern const char kContentSecurityPolicy[];
   extern const char kConvertedFromUserScript[];
   extern const char kCss[];
   extern const char kCtrlKey[];
   extern const char kCurrentLocale[];
   extern const char kDefaultLocale[];
@@ skipping 116 matching lines @@
   extern const char kCannotScriptGallery[];
   extern const char kCannotUninstallManagedExtension[];
   extern const char kChromeVersionTooLow[];
   extern const char kDevToolsExperimental[];
   extern const char kDisabledByPolicy[];
   extern const char kExperimentalFlagRequired[];
   extern const char kExpectString[];
   extern const char kFeatureNotAllowed[];
   extern const char kInvalidAllFrames[];
   extern const char kInvalidBackground[];
+  extern const char kInvalidBackgroundScript[];
+  extern const char kInvalidBackgroundScripts[];
   extern const char kInvalidBackgroundInHostedApp[];
   extern const char kInvalidBrowserAction[];
   extern const char kInvalidBrowseURL[];
   extern const char kInvalidBrowseURLs[];
   extern const char kInvalidChromeURLOverrides[];
   extern const char kInvalidContentScript[];
   extern const char kInvalidContentScriptsList[];
   extern const char kInvalidContentSecurityPolicy[];
   extern const char kInvalidCss[];
   extern const char kInvalidCssList[];
@@ skipping 159 matching lines @@
   // The name of a temporary directory to install an extension into for
   // validation before finalizing install.
   extern const char kTempExtensionName[];
 
   // The file to write our decoded images to, relative to the extension_path.
   extern const char kDecodedImagesFilename[];
 
   // The file to write our decoded message catalogs to, relative to the
   // extension_path.
   extern const char kDecodedMessageCatalogsFilename[];
+
+  // The filename to use for a background page generated from
+  // background.scripts.
+  extern const char kGeneratedBackgroundPageFilename[];
 }
 
 namespace extension_misc {
   const int kUnknownWindowId = -1;
 
   // The extension id of the bookmark manager.
   extern const char kBookmarkManagerId[];
 
   // The extension id of the Web Store component application.
   extern const char kWebStoreAppId[];
@@ skipping 116 matching lines @@
 
   enum UnloadedExtensionReason {
     UNLOAD_REASON_DISABLE,    // Extension is being disabled.
     UNLOAD_REASON_UPDATE,     // Extension is being updated to a newer version.
     UNLOAD_REASON_UNINSTALL,  // Extension is being uninstalled.
     UNLOAD_REASON_TERMINATE,  // Extension has terminated.
   };
 }  // extension_misc
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_CONSTANTS_H_