Add an experimental permissions API for extensions.

chrome/common/extensions/extension_constants.h

 // Copyright (c) 2011 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 "base/basictypes.h"
 
@@ skipping 37 matching lines @@
   extern const char* kLaunchWidth;
   extern const char* kLayouts;
   extern const char* kMatches;
   extern const char* kMinimumChromeVersion;
   extern const char* kNaClModules;
   extern const char* kNaClModulesMIMEType;
   extern const char* kNaClModulesPath;
   extern const char* kName;
   extern const char* kOmnibox;
   extern const char* kOmniboxKeyword;
+  extern const char* kOptionalPermissions;
   extern const char* kOptionsPage;
   extern const char* kPageAction;
   extern const char* kPageActionDefaultIcon;
   extern const char* kPageActionDefaultPopup;
   extern const char* kPageActionDefaultTitle;
   extern const char* kPageActionIcons;
   extern const char* kPageActionId;
   extern const char* kPageActionPopup;
   extern const char* kPageActionPopupHeight;
   extern const char* kPageActionPopupPath;
@@ skipping 336 matching lines @@
     INSTALL_CAUSE_UNSET = 0,
     INSTALL_CAUSE_USER_DOWNLOAD,
     INSTALL_CAUSE_UPDATE,
     INSTALL_CAUSE_EXTERNAL_FILE,
     INSTALL_CAUSE_AUTOMATION,
     NUM_INSTALL_CAUSES
   };
 }  // extension_misc
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_CONSTANTS_H_