Move each permission classes to its own files in extensions/permissions

chrome/browser/extensions/api/permissions/permissions_api_helpers.h

Index: chrome/browser/extensions/api/permissions/permissions_api_helpers.h
diff --git a/chrome/browser/extensions/api/permissions/permissions_api_helpers.h b/chrome/browser/extensions/api/permissions/permissions_api_helpers.h
index 158ca0445124a994f7576bc6e78c8ad377f35b29..65cc59106d6014acee76ac47c050e918e99bed4b 100644
--- a/chrome/browser/extensions/api/permissions/permissions_api_helpers.h
+++ b/chrome/browser/extensions/api/permissions/permissions_api_helpers.h
@@ -14,10 +14,12 @@ namespace base {
 class DictionaryValue;
 }
 
-class ExtensionPermissionSet;
+
 
 namespace extensions {
 
+class PermissionSet;
+
 namespace api {
 namespace permissions {
 struct Permissions;
@@ -28,11 +30,11 @@ namespace permissions_api_helpers {
 
 // Converts the permission |set| to a permissions object.
 scoped_ptr<api::permissions::Permissions> PackPermissionSet(
-    const ExtensionPermissionSet* set);
+    const PermissionSet* set);
 
 // Creates a permission set from |permissions|. Returns NULL if the permissions
 // cannot be converted to a permission set, in which case |error| will be set.
-scoped_refptr<ExtensionPermissionSet> UnpackPermissionSet(
+scoped_refptr<PermissionSet> UnpackPermissionSet(
     const api::permissions::Permissions& permissions, std::string* error);
 
 }  // namespace permissions_api_helpers